diff --git a/apps/comments/lib/Search/CommentsSearchProvider.php b/apps/comments/lib/Search/CommentsSearchProvider.php
index 4d316525f9bc6..8b9d9f1f46a70 100644
--- a/apps/comments/lib/Search/CommentsSearchProvider.php
+++ b/apps/comments/lib/Search/CommentsSearchProvider.php
@@ -53,10 +53,6 @@ public function getOrder(string $route, array $routeParameters): int {
 	public function search(IUser $user, ISearchQuery $query): SearchResult {
 		$userFolder = $this->rootFolder->getUserFolder($user->getUID());
 
-		if ($userFolder === null) {
-			return SearchResult::complete($this->l10n->t('Comments'), []);
-		}
-
 		$result = [];
 		$numComments = 50;
 		$offset = 0;
diff --git a/apps/comments/tests/Unit/Activity/ListenerTest.php b/apps/comments/tests/Unit/Activity/ListenerTest.php
index 358fd1b3af2f4..882c7e903e096 100644
--- a/apps/comments/tests/Unit/Activity/ListenerTest.php
+++ b/apps/comments/tests/Unit/Activity/ListenerTest.php
@@ -17,8 +17,8 @@
 use OCP\Files\Config\ICachedMountFileInfo;
 use OCP\Files\Config\IMountProviderCollection;
 use OCP\Files\Config\IUserMountCache;
-use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\Node;
 use OCP\IUser;
 use OCP\IUserSession;
@@ -93,7 +93,7 @@ public function testCommentEvent(): void {
 
 		$node = $this->createMock(Node::class);
 
-		$ownerFolder = $this->createMock(Folder::class);
+		$ownerFolder = $this->createMock(IUserFolder::class);
 		$ownerFolder->expects($this->any())
 			->method('getFirstNodeById')
 			->willReturn($node);
diff --git a/apps/comments/tests/Unit/Controller/NotificationsTest.php b/apps/comments/tests/Unit/Controller/NotificationsTest.php
index 5b1180f662b60..ed6e834629452 100644
--- a/apps/comments/tests/Unit/Controller/NotificationsTest.php
+++ b/apps/comments/tests/Unit/Controller/NotificationsTest.php
@@ -15,8 +15,8 @@
 use OCP\Comments\IComment;
 use OCP\Comments\ICommentsManager;
 use OCP\Comments\NotFoundException;
-use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\Node;
 use OCP\IRequest;
 use OCP\IURLGenerator;
@@ -99,7 +99,7 @@ public function testViewSuccess(): void {
 			->willReturn($comment);
 
 		$file = $this->createMock(Node::class);
-		$folder = $this->createMock(Folder::class);
+		$folder = $this->createMock(IUserFolder::class);
 		$user = $this->createMock(IUser::class);
 
 		$this->rootFolder->expects($this->once())
@@ -176,7 +176,7 @@ public function testViewNoFile(): void {
 			->with('42')
 			->willReturn($comment);
 
-		$folder = $this->createMock(Folder::class);
+		$folder = $this->createMock(IUserFolder::class);
 
 		$this->rootFolder->expects($this->once())
 			->method('getUserFolder')
diff --git a/apps/comments/tests/Unit/Notification/NotifierTest.php b/apps/comments/tests/Unit/Notification/NotifierTest.php
index cd2d1be14080d..01c6c4c869ef8 100644
--- a/apps/comments/tests/Unit/Notification/NotifierTest.php
+++ b/apps/comments/tests/Unit/Notification/NotifierTest.php
@@ -12,8 +12,8 @@
 use OCP\Comments\IComment;
 use OCP\Comments\ICommentsManager;
 use OCP\Comments\NotFoundException;
-use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\Node;
 use OCP\IL10N;
 use OCP\IURLGenerator;
@@ -80,7 +80,7 @@ public function testPrepareSuccess(): void {
 			->method('getPath')
 			->willReturn('/you/files/' . $fileName);
 
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->folder->expects($this->once())
 			->method('getUserFolder')
 			->with('you')
@@ -196,7 +196,7 @@ public function testPrepareSuccessDeletedUser(): void {
 			->method('getPath')
 			->willReturn('/you/files/' . $fileName);
 
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->folder->expects($this->once())
 			->method('getUserFolder')
 			->with('you')
@@ -491,7 +491,7 @@ public function testPrepareUnresolvableFileID(): void {
 
 		$displayName = 'Huraga';
 
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->folder->expects($this->once())
 			->method('getUserFolder')
 			->with('you')
diff --git a/apps/dav/lib/Files/RootCollection.php b/apps/dav/lib/Files/RootCollection.php
index 2c01d1ff4baa2..5fb52289de7b3 100644
--- a/apps/dav/lib/Files/RootCollection.php
+++ b/apps/dav/lib/Files/RootCollection.php
@@ -7,7 +7,6 @@
  */
 namespace OCA\DAV\Files;
 
-use OCP\Files\FileInfo;
 use OCP\Files\IRootFolder;
 use OCP\IUserSession;
 use OCP\Server;
@@ -37,9 +36,6 @@ public function getChildForPrincipal(array $principalInfo) {
 			return new SimpleCollection($name);
 		}
 		$userFolder = Server::get(IRootFolder::class)->getUserFolder($user->getUID());
-		if (!($userFolder instanceof FileInfo)) {
-			throw new \Exception('Home does not exist');
-		}
 		return new FilesHome($principalInfo, $userFolder);
 	}
 
diff --git a/apps/dav/tests/unit/Controller/DirectControllerTest.php b/apps/dav/tests/unit/Controller/DirectControllerTest.php
index 837adde1da7fd..16cb14baeb86c 100644
--- a/apps/dav/tests/unit/Controller/DirectControllerTest.php
+++ b/apps/dav/tests/unit/Controller/DirectControllerTest.php
@@ -19,6 +19,7 @@
 use OCP\Files\File;
 use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\IRequest;
 use OCP\IURLGenerator;
 use OCP\Security\ISecureRandom;
@@ -59,7 +60,7 @@ protected function setUp(): void {
 	}
 
 	public function testGetUrlNonExistingFileId(): void {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')
 			->with('awesomeUser')
 			->willReturn($userFolder);
@@ -73,7 +74,7 @@ public function testGetUrlNonExistingFileId(): void {
 	}
 
 	public function testGetUrlForFolder(): void {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')
 			->with('awesomeUser')
 			->willReturn($userFolder);
@@ -89,7 +90,7 @@ public function testGetUrlForFolder(): void {
 	}
 
 	public function testGetUrlValid(): void {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')
 			->with('awesomeUser')
 			->willReturn($userFolder);
diff --git a/apps/dav/tests/unit/Direct/DirectFileTest.php b/apps/dav/tests/unit/Direct/DirectFileTest.php
index f6f0f49fa8c37..e3b95cd4347c1 100644
--- a/apps/dav/tests/unit/Direct/DirectFileTest.php
+++ b/apps/dav/tests/unit/Direct/DirectFileTest.php
@@ -12,8 +12,8 @@
 use OCA\DAV\Direct\DirectFile;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\Files\File;
-use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use PHPUnit\Framework\MockObject\MockObject;
 use Sabre\DAV\Exception\Forbidden;
 use Test\TestCase;
@@ -21,7 +21,7 @@
 class DirectFileTest extends TestCase {
 	private Direct $direct;
 	private IRootFolder&MockObject $rootFolder;
-	private Folder&MockObject $userFolder;
+	private IUserFolder&MockObject $userFolder;
 	private File&MockObject $file;
 	private IEventDispatcher&MockObject $eventDispatcher;
 	private DirectFile $directFile;
@@ -37,7 +37,7 @@ protected function setUp(): void {
 
 		$this->rootFolder = $this->createMock(IRootFolder::class);
 
-		$this->userFolder = $this->createMock(Folder::class);
+		$this->userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')
 			->with('directUser')
 			->willReturn($this->userFolder);
diff --git a/apps/files/tests/Command/DeleteOrphanedFilesTest.php b/apps/files/tests/Command/DeleteOrphanedFilesTest.php
index 13c7a36785ae6..7814242a84194 100644
--- a/apps/files/tests/Command/DeleteOrphanedFilesTest.php
+++ b/apps/files/tests/Command/DeleteOrphanedFilesTest.php
@@ -11,6 +11,7 @@
 use OC\Files\View;
 use OCA\Files\Command\DeleteOrphanedFiles;
 use OCP\Files\IRootFolder;
+use OCP\Files\NotFoundException;
 use OCP\Files\StorageNotAvailableException;
 use OCP\IDBConnection;
 use OCP\IUserManager;
@@ -46,6 +47,13 @@ protected function setUp(): void {
 	}
 
 	protected function tearDown(): void {
+		// since we deleted the storage it might throw a (valid) StorageNotAvailableException
+		try {
+			$view = new View('/' . $this->user1 . '/files');
+			$view->unlink('test');
+		} catch (StorageNotAvailableException|NotFoundException $e) {
+		}
+
 		$userManager = Server::get(IUserManager::class);
 		$user1 = $userManager->get($this->user1);
 		if ($user1) {
@@ -87,10 +95,10 @@ public function testClearFiles(): void {
 
 		$this->loginAsUser($this->user1);
 
-		$view = new View('/' . $this->user1 . '/');
-		$view->mkdir('files/test');
+		$view = new View('/' . $this->user1 . '/files');
+		$view->mkdir('test');
 
-		$fileInfo = $view->getFileInfo('files/test');
+		$fileInfo = $view->getFileInfo('test');
 
 		$storageId = $fileInfo->getStorage()->getId();
 		$numericStorageId = $fileInfo->getStorage()->getCache()->getNumericStorageId();
@@ -126,13 +134,5 @@ public function testClearFiles(): void {
 
 		$this->assertCount(0, $this->getFile($fileInfo->getId()), 'Asserts that file gets cleaned up');
 		$this->assertEquals(0, $this->getMountsCount($numericStorageId), 'Asserts that mount gets cleaned up');
-
-		// Rescan folder to add back to cache before deleting
-		$rootFolder->getUserFolder($this->user1)->getStorage()->getScanner()->scan('');
-		// since we deleted the storage it might throw a (valid) StorageNotAvailableException
-		try {
-			$view->unlink('files/test');
-		} catch (StorageNotAvailableException $e) {
-		}
 	}
 }
diff --git a/apps/files/tests/Controller/ConversionApiControllerTest.php b/apps/files/tests/Controller/ConversionApiControllerTest.php
index 659fbe1a9560d..a994d3374d725 100644
--- a/apps/files/tests/Controller/ConversionApiControllerTest.php
+++ b/apps/files/tests/Controller/ConversionApiControllerTest.php
@@ -14,8 +14,8 @@
 use OCP\AppFramework\OCS\OCSNotFoundException;
 use OCP\Files\Conversion\IConversionManager;
 use OCP\Files\File;
-use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\IL10N;
 use OCP\IRequest;
 use PHPUnit\Framework\MockObject\MockObject;
@@ -33,7 +33,7 @@ class ConversionApiControllerTest extends TestCase {
 	private IConversionManager&MockObject $fileConversionManager;
 	private IRootFolder&MockObject $rootFolder;
 	private File&MockObject $file;
-	private Folder&MockObject $userFolder;
+	private IUserFolder&MockObject $userFolder;
 	private IL10N&MockObject $l10n;
 	private string $user;
 
@@ -46,7 +46,7 @@ protected function setUp(): void {
 		$this->l10n = $this->createMock(IL10N::class);
 		$this->user = 'userid';
 
-		$this->userFolder = $this->createMock(Folder::class);
+		$this->userFolder = $this->createMock(IUserFolder::class);
 
 		$this->rootFolder = $this->createMock(IRootFolder::class);
 		$this->rootFolder->method('getUserFolder')->with($this->user)->willReturn($this->userFolder);
diff --git a/apps/files/tests/Controller/ViewControllerTest.php b/apps/files/tests/Controller/ViewControllerTest.php
index 631097cbc6019..733dcda1cc092 100644
--- a/apps/files/tests/Controller/ViewControllerTest.php
+++ b/apps/files/tests/Controller/ViewControllerTest.php
@@ -25,6 +25,7 @@
 use OCP\Files\File;
 use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\Template\ITemplateManager;
 use OCP\ICacheFactory;
 use OCP\IConfig;
@@ -173,7 +174,7 @@ public function testIndexWithRegularBrowser(): void {
 				[$this->user->getUID(), 'files', 'show_grid', true],
 			]);
 
-		$baseFolderFiles = $this->getMockBuilder(Folder::class)->getMock();
+		$baseFolderFiles = $this->getMockBuilder(IUserFolder::class)->getMock();
 
 		$this->rootFolder->expects($this->any())
 			->method('getUserFolder')
@@ -221,7 +222,7 @@ public function testShortRedirect(?string $openfile, ?string $opendetails, strin
 			->with('files')
 			->willReturn(true);
 
-		$baseFolderFiles = $this->getMockBuilder(Folder::class)->getMock();
+		$baseFolderFiles = $this->getMockBuilder(IUserFolder::class)->getMock();
 		$this->rootFolder->expects($this->any())
 			->method('getUserFolder')
 			->with('testuser1')
@@ -256,7 +257,7 @@ public function testShowFileRouteWithTrashedFile(): void {
 			->method('getPath')
 			->willReturn('testuser1/files_trashbin/files/test.d1462861890/sub');
 
-		$baseFolderFiles = $this->createMock(Folder::class);
+		$baseFolderFiles = $this->createMock(IUserFolder::class);
 		$baseFolderTrash = $this->createMock(Folder::class);
 
 		$this->rootFolder->expects($this->any())
diff --git a/apps/files_sharing/tests/ApiTest.php b/apps/files_sharing/tests/ApiTest.php
index e0340b3ce0015..62c55c11b63fa 100644
--- a/apps/files_sharing/tests/ApiTest.php
+++ b/apps/files_sharing/tests/ApiTest.php
@@ -85,7 +85,7 @@ protected function setUp(): void {
 		$mount = $this->view->getMount($this->filename);
 		$mount->getStorage()->getScanner()->scan('', Scanner::SCAN_RECURSIVE);
 
-		$this->userFolder = \OC::$server->getUserFolder(self::TEST_FILES_SHARING_API_USER1);
+		$this->userFolder = Server::get(IRootFolder::class)->getUserFolder(self::TEST_FILES_SHARING_API_USER1);
 
 		$this->appConfig = $this->createMock(IAppConfig::class);
 	}
diff --git a/apps/files_sharing/tests/ApplicationTest.php b/apps/files_sharing/tests/ApplicationTest.php
index a6ff620722a5d..1379aa7428901 100644
--- a/apps/files_sharing/tests/ApplicationTest.php
+++ b/apps/files_sharing/tests/ApplicationTest.php
@@ -18,6 +18,7 @@
 use OCP\Files\File;
 use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\Storage\IStorage;
 use OCP\IUser;
 use OCP\IUserSession;
@@ -78,7 +79,7 @@ public function testCheckDirectCanBeDownloaded(
 		$file = $this->createMock(File::class);
 		$file->method('getStorage')->willReturn($fileStorage);
 
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userFolder->method('get')->willReturn($file);
 
 		$user = $this->createMock(IUser::class);
@@ -166,7 +167,7 @@ function (string $fileStorage) use ($nonSharedStorage, $secureSharedStorage) {
 		$rootFolder->method('getStorage')->willReturn($nonSharedStorage);
 		$rootFolder->method('getDirectoryListing')->willReturn([$folder]);
 
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userFolder->method('get')->willReturn($rootFolder);
 
 		$user = $this->createMock(IUser::class);
diff --git a/apps/files_sharing/tests/Collaboration/ShareRecipientSorterTest.php b/apps/files_sharing/tests/Collaboration/ShareRecipientSorterTest.php
index 2a2e1c2909667..61f94ac6852df 100644
--- a/apps/files_sharing/tests/Collaboration/ShareRecipientSorterTest.php
+++ b/apps/files_sharing/tests/Collaboration/ShareRecipientSorterTest.php
@@ -7,8 +7,8 @@
 namespace OCA\Files_Sharing\Tests\Collaboration;
 
 use OCA\Files_Sharing\Collaboration\ShareRecipientSorter;
-use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\Node;
 use OCP\IUser;
 use OCP\IUserSession;
@@ -42,8 +42,7 @@ protected function setUp(): void {
 	public function testSort($data): void {
 		$node = $this->createMock(Node::class);
 
-		/** @var Folder|\PHPUnit\Framework\MockObject\MockObject $folder */
-		$folder = $this->createMock(Folder::class);
+		$folder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->expects($this->any())
 			->method('getUserFolder')
 			->willReturn($folder);
@@ -81,8 +80,7 @@ public function testSort($data): void {
 	}
 
 	public function testSortNoNodes(): void {
-		/** @var Folder|\PHPUnit\Framework\MockObject\MockObject $folder */
-		$folder = $this->createMock(Folder::class);
+		$folder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->expects($this->any())
 			->method('getUserFolder')
 			->willReturn($folder);
diff --git a/apps/files_sharing/tests/Controller/ShareAPIControllerTest.php b/apps/files_sharing/tests/Controller/ShareAPIControllerTest.php
index 28caea90ceae8..241d5cf5edd19 100644
--- a/apps/files_sharing/tests/Controller/ShareAPIControllerTest.php
+++ b/apps/files_sharing/tests/Controller/ShareAPIControllerTest.php
@@ -24,6 +24,7 @@
 use OCP\Files\File;
 use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\Mount\IMountPoint;
 use OCP\Files\Mount\IShareOwnerlessMount;
 use OCP\Files\NotFoundException;
@@ -269,7 +270,7 @@ public function testDeleteShareLocked(): void {
 		$share = $this->newShare();
 		$share->setNode($node);
 
-		$userFolder = $this->getMockBuilder(Folder::class)->getMock();
+		$userFolder = $this->getMockBuilder(IUserFolder::class)->getMock();
 		$this->rootFolder->method('getUserFolder')
 			->with($this->currentUser)
 			->willReturn($userFolder);
@@ -434,7 +435,7 @@ public function testDeleteSharedWithMyGroup(): void {
 			->method('lock')
 			->with(ILockingProvider::LOCK_SHARED);
 
-		$userFolder = $this->getMockBuilder(Folder::class)->getMock();
+		$userFolder = $this->getMockBuilder(IUserFolder::class)->getMock();
 		$this->rootFolder->method('getUserFolder')
 			->with($this->currentUser)
 			->willReturn($userFolder);
@@ -497,7 +498,7 @@ public function testDeleteSharedWithGroupIDontBelongTo(): void {
 			->method('lock')
 			->with(ILockingProvider::LOCK_SHARED);
 
-		$userFolder = $this->getMockBuilder(Folder::class)->getMock();
+		$userFolder = $this->getMockBuilder(IUserFolder::class)->getMock();
 		$this->rootFolder->method('getUserFolder')
 			->with($this->currentUser)
 			->willReturn($userFolder);
@@ -533,7 +534,7 @@ public function testDeleteShareOwnerless(): void {
 			->method('getMountPoint')
 			->willReturn($mount);
 
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userFolder->method('getById')
 			->with(2)
 			->willReturn([$file]);
@@ -912,7 +913,7 @@ public function testGetShare(array $shareParams, array $result, bool $attributes
 			->with($share->getFullId(), 'currentUser')
 			->willReturn($share);
 
-		$userFolder = $this->getMockBuilder(Folder::class)->getMock();
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userFolder
 			->method('getRelativePath')
 			->willReturnArgument(0);
@@ -978,7 +979,7 @@ public function testGetShareInvalidNode(): void {
 			->with('ocinternal:42', 'currentUser')
 			->willReturn($share);
 
-		$userFolder = $this->getMockBuilder(Folder::class)->getMock();
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->currentUser)
 			->willReturn($userFolder);
@@ -1627,7 +1628,7 @@ function ($share) {
 				}
 			);
 
-		$userFolder = $this->getMockBuilder(Folder::class)->getMock();
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userFolder->method('get')
 			->with('path')
 			->willReturn($this->mockSimpleNode(...$getSharesParameters['node']));
@@ -1697,7 +1698,7 @@ public function testCannotAccessLinkShare(): void {
 		$share->method('getShareType')->willReturn(IShare::TYPE_LINK);
 		$share->method('getNodeId')->willReturn(42);
 
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->currentUser)
 			->willReturn($userFolder);
@@ -1714,7 +1715,7 @@ public function testCanAccessShareWithPermissions(int $permissions, bool $expect
 
 		$file = $this->createMock(File::class);
 
-		$userFolder = $this->getMockBuilder(Folder::class)->getMock();
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userFolder->method('getFirstNodeById')
 			->with($share->getNodeId())
 			->willReturn($file);
@@ -1752,7 +1753,7 @@ public function testCanAccessShareAsGroupMember(string $group, bool $expected):
 
 		$file = $this->createMock(File::class);
 
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userFolder->method('getFirstNodeById')
 			->with($share->getNodeId())
 			->willReturn($file);
@@ -1813,7 +1814,7 @@ public function testCanAccessRoomShare(
 		$share->method('getShareType')->willReturn(IShare::TYPE_ROOM);
 		$share->method('getSharedWith')->willReturn('recipientRoom');
 
-		$userFolder = $this->getMockBuilder(Folder::class)->getMock();
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->currentUser)
 			->willReturn($userFolder);
@@ -1862,7 +1863,7 @@ public function testCreateShareInvalidPath(): void {
 		$this->expectException(OCSNotFoundException::class);
 		$this->expectExceptionMessage('Wrong path, file/folder does not exist');
 
-		$userFolder = $this->getMockBuilder(Folder::class)->getMock();
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->expects($this->once())
 			->method('getUserFolder')
 			->with('currentUser')
@@ -2190,10 +2191,11 @@ public function testCreateShareLinkNoLinksAllowed(): void {
 				['OCA\Files_Sharing\SharedStorage', false],
 			]);
 		$path->method('getStorage')->willReturn($storage);
-		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturnSelf();
-		$this->rootFolder->method('get')->with('valid-path')->willReturn($path);
-		$this->rootFolder->method('getById')
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('get')->with('valid-path')->willReturn($path);
+		$userFolder->method('getById')
 			->willReturn([]);
+		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturn($userFolder);
 
 		$this->shareManager->method('newShare')->willReturn(Server::get(IManager::class)->newShare());
 		$this->shareManager->method('shareApiLinkAllowPublicUpload')->willReturn(true);
@@ -2216,10 +2218,11 @@ public function testCreateShareLinkNoPublicUpload(): void {
 				['OCA\Files_Sharing\SharedStorage', false],
 			]);
 		$path->method('getStorage')->willReturn($storage);
-		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturnSelf();
-		$this->rootFolder->method('get')->with('valid-path')->willReturn($path);
-		$this->rootFolder->method('getById')
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('get')->with('valid-path')->willReturn($path);
+		$userFolder->method('getById')
 			->willReturn([]);
+		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturn($userFolder);
 
 		$this->shareManager->method('newShare')->willReturn(Server::get(IManager::class)->newShare());
 		$this->shareManager->method('shareApiAllowLinks')->willReturn(true);
@@ -2243,10 +2246,11 @@ public function testCreateShareLinkPublicUploadFile(): void {
 		$file->method('getId')->willReturn(42);
 		$file->method('getStorage')->willReturn($storage);
 
-		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturnSelf();
-		$this->rootFolder->method('get')->with('valid-path')->willReturn($file);
-		$this->rootFolder->method('getById')
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('get')->with('valid-path')->willReturn($file);
+		$userFolder->method('getById')
 			->willReturn([]);
+		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturn($userFolder);
 
 		$this->shareManager->method('newShare')->willReturn(Server::get(IManager::class)->newShare());
 		$this->shareManager->method('shareApiAllowLinks')->willReturn(true);
@@ -2267,10 +2271,11 @@ public function testCreateShareLinkPublicUploadFolder(): void {
 				['OCA\Files_Sharing\SharedStorage', false],
 			]);
 		$path->method('getStorage')->willReturn($storage);
-		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturnSelf();
-		$this->rootFolder->method('get')->with('valid-path')->willReturn($path);
-		$this->rootFolder->method('getById')
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('get')->with('valid-path')->willReturn($path);
+		$userFolder->method('getById')
 			->willReturn([]);
+		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturn($userFolder);
 
 		$this->shareManager->method('newShare')->willReturn(Server::get(IManager::class)->newShare());
 		$this->shareManager->method('shareApiAllowLinks')->willReturn(true);
@@ -2306,10 +2311,11 @@ public function testCreateShareLinkPassword(): void {
 				['OCA\Files_Sharing\SharedStorage', false],
 			]);
 		$path->method('getStorage')->willReturn($storage);
-		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturnSelf();
-		$this->rootFolder->method('get')->with('valid-path')->willReturn($path);
-		$this->rootFolder->method('getById')
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('get')->with('valid-path')->willReturn($path);
+		$userFolder->method('getById')
 			->willReturn([]);
+		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturn($userFolder);
 
 		$this->shareManager->method('newShare')->willReturn(Server::get(IManager::class)->newShare());
 		$this->shareManager->method('shareApiAllowLinks')->willReturn(true);
@@ -2345,10 +2351,11 @@ public function testCreateShareLinkSendPasswordByTalk(): void {
 				['OCA\Files_Sharing\SharedStorage', false],
 			]);
 		$path->method('getStorage')->willReturn($storage);
-		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturnSelf();
-		$this->rootFolder->method('get')->with('valid-path')->willReturn($path);
-		$this->rootFolder->method('getById')
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('get')->with('valid-path')->willReturn($path);
+		$userFolder->method('getById')
 			->willReturn([]);
+		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturn($userFolder);
 
 		$this->shareManager->method('newShare')->willReturn(Server::get(IManager::class)->newShare());
 		$this->shareManager->method('shareApiAllowLinks')->willReturn(true);
@@ -2392,10 +2399,11 @@ public function testCreateShareLinkSendPasswordByTalkWithTalkDisabled(): void {
 			]);
 		$path->method('getStorage')->willReturn($storage);
 		$path->method('getPath')->willReturn('valid-path');
-		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturnSelf();
-		$this->rootFolder->method('get')->with('valid-path')->willReturn($path);
-		$this->rootFolder->method('getById')
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('get')->with('valid-path')->willReturn($path);
+		$userFolder->method('getById')
 			->willReturn([]);
+		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturn($userFolder);
 
 		$this->shareManager->method('newShare')->willReturn(Server::get(IManager::class)->newShare());
 		$this->shareManager->method('shareApiAllowLinks')->willReturn(true);
@@ -2430,10 +2438,11 @@ public function testCreateShareValidExpireDate(): void {
 				['OCA\Files_Sharing\SharedStorage', false],
 			]);
 		$path->method('getStorage')->willReturn($storage);
-		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturnSelf();
-		$this->rootFolder->method('get')->with('valid-path')->willReturn($path);
-		$this->rootFolder->method('getById')
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('get')->with('valid-path')->willReturn($path);
+		$userFolder->method('getById')
 			->willReturn([]);
+		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturn($userFolder);
 
 		$this->shareManager->method('newShare')->willReturn(Server::get(IManager::class)->newShare());
 		$this->shareManager->method('shareApiAllowLinks')->willReturn(true);
@@ -2476,10 +2485,11 @@ public function testCreateShareInvalidExpireDate(): void {
 				['OCA\Files_Sharing\SharedStorage', false],
 			]);
 		$path->method('getStorage')->willReturn($storage);
-		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturnSelf();
-		$this->rootFolder->method('get')->with('valid-path')->willReturn($path);
-		$this->rootFolder->method('getById')
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('get')->with('valid-path')->willReturn($path);
+		$userFolder->method('getById')
 			->willReturn([]);
+		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturn($userFolder);
 
 		$this->shareManager->method('newShare')->willReturn(Server::get(IManager::class)->newShare());
 		$this->shareManager->method('shareApiAllowLinks')->willReturn(true);
@@ -2835,7 +2845,7 @@ public function testCreateReshareOfFederatedMountNoDeletePermissions(): void {
 			])->onlyMethods(['formatShare'])
 			->getMock();
 
-		$userFolder = $this->getMockBuilder(Folder::class)->getMock();
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->expects($this->exactly(2))
 			->method('getUserFolder')
 			->with('currentUser')
@@ -4022,7 +4032,7 @@ public function testUpdateShareOwnerless(): void {
 			->method('getMountPoint')
 			->willReturn($mount);
 
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userFolder->method('getById')
 			->with(2)
 			->willReturn([$file]);
@@ -5000,20 +5010,19 @@ function ($user) {
 			->with('files_sharing.sharecontroller.showShare', ['token' => 'myToken'])
 			->willReturn('myLink');
 
-		$this->rootFolder->method('getUserFolder')
-			->with($this->currentUser)
-			->willReturnSelf();
-		$this->dateTimeZone->method('getTimezone')->willReturn(new \DateTimeZone('UTC'));
-
+		$userFolder = $this->createMock(IUserFolder::class);
 		if (!$exception) {
-			$this->rootFolder->method('getFirstNodeById')
+			$userFolder->method('getFirstNodeById')
 				->with($share->getNodeId())
 				->willReturn($share->getNode());
 
-			$this->rootFolder->method('getRelativePath')
+			$userFolder->method('getRelativePath')
 				->with($share->getNode()->getPath())
 				->willReturnArgument(0);
 		}
+		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturn($userFolder);
+		$this->dateTimeZone->method('getTimezone')->willReturn(new \DateTimeZone('UTC'));
+
 
 		$cm = $this->createMock(\OCP\Contacts\IManager::class);
 		$this->overwriteService(\OCP\Contacts\IManager::class, $cm);
@@ -5193,17 +5202,14 @@ public function testFormatRoomShare(array $expects, bool $helperAvailable, array
 			->setNote('personal note')
 			->setId(42);
 
-		$this->rootFolder->method('getUserFolder')
-			->with($this->currentUser)
-			->willReturnSelf();
-
-		$this->rootFolder->method('getFirstNodeById')
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getFirstNodeById')
 			->with($share->getNodeId())
 			->willReturn($share->getNode());
-
-		$this->rootFolder->method('getRelativePath')
+		$userFolder->method('getRelativePath')
 			->with($share->getNode()->getPath())
 			->willReturnArgument(0);
+		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturn($userFolder);
 
 		if (!$helperAvailable) {
 			$this->appManager->method('isEnabledForUser')
@@ -5241,7 +5247,7 @@ public function testFormatRoomShare(array $expects, bool $helperAvailable, array
 	 */
 	private function getNonSharedUserFolder(): array {
 		$node = $this->getMockBuilder(Folder::class)->getMock();
-		$userFolder = $this->getMockBuilder(Folder::class)->getMock();
+		$userFolder = $this->createMock(IUserFolder::class);
 		$storage = $this->createMock(IStorage::class);
 		$storage->method('instanceOfStorage')
 			->willReturnMap([
@@ -5258,11 +5264,11 @@ private function getNonSharedUserFolder(): array {
 	}
 
 	/**
-	 * @return list{Folder, File}
+	 * @return list{IUserFolder, File}
 	 */
 	private function getNonSharedUserFile(): array {
 		$node = $this->getMockBuilder(File::class)->getMock();
-		$userFolder = $this->getMockBuilder(Folder::class)->getMock();
+		$userFolder = $this->createMock(IUserFolder::class);
 		$storage = $this->createMock(IStorage::class);
 		$storage->method('instanceOfStorage')
 			->willReturnMap([
@@ -5350,17 +5356,14 @@ public function testFormatShareWithFederatedShare(bool $isKnownServer, bool $isT
 
 		$this->previewManager->method('isAvailable')->with($node)->willReturn(false);
 
-		$this->rootFolder->method('getUserFolder')
-			->with($this->currentUser)
-			->willReturnSelf();
-
-		$this->rootFolder->method('getFirstNodeById')
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getFirstNodeById')
 			->with($share->getNodeId())
 			->willReturn($node);
-
-		$this->rootFolder->method('getRelativePath')
+		$userFolder->method('getRelativePath')
 			->with($node->getPath())
 			->willReturnArgument(0);
+		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturn($userFolder);
 
 		$serverName = 'remoteserver.com';
 		$this->trustedServers->method('isTrustedServer')
@@ -5413,17 +5416,14 @@ public function testFormatShareWithFederatedShareWithAtInUsername(): void {
 
 		$this->previewManager->method('isAvailable')->with($node)->willReturn(false);
 
-		$this->rootFolder->method('getUserFolder')
-			->with($this->currentUser)
-			->willReturnSelf();
-
-		$this->rootFolder->method('getFirstNodeById')
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getFirstNodeById')
 			->with($share->getNodeId())
 			->willReturn($node);
-
-		$this->rootFolder->method('getRelativePath')
+		$userFolder->method('getRelativePath')
 			->with($node->getPath())
 			->willReturnArgument(0);
+		$this->rootFolder->method('getUserFolder')->with($this->currentUser)->willReturn($userFolder);
 
 		$serverName = 'remoteserver.com';
 		$this->trustedServers->method('isTrustedServer')
@@ -5440,7 +5440,7 @@ public function testOwnerCanAlwaysDownload(): void {
 
 		$share = $this->createMock(IShare::class);
 		$node = $this->createMock(File::class);
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$owner = $this->createMock(IUser::class);
 
 		$share->method('getSharedBy')->willReturn('sharedByUser');
@@ -5462,7 +5462,7 @@ public function testParentHideDownloadEnforcedOnChild(): void {
 
 		$share = $this->createMock(IShare::class);
 		$node = $this->createMock(File::class);
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$owner = $this->createMock(IUser::class);
 		$storage = $this->createMock(SharedStorage::class);
 		$originalShare = $this->createMock(IShare::class);
@@ -5493,7 +5493,7 @@ public function testUserCanHideWhenParentAllows(): void {
 
 		$share = $this->createMock(IShare::class);
 		$node = $this->createMock(File::class);
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$owner = $this->createMock(IUser::class);
 		$storage = $this->createMock(SharedStorage::class);
 		$originalShare = $this->createMock(IShare::class);
@@ -5524,7 +5524,7 @@ public function testParentDownloadAttributeInherited(): void {
 
 		$share = $this->createMock(IShare::class);
 		$node = $this->createMock(File::class);
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$owner = $this->createMock(IUser::class);
 		$storage = $this->createMock(SharedStorage::class);
 		$originalShare = $this->createMock(IShare::class);
@@ -5562,7 +5562,7 @@ public function testFederatedStorageRespectsUserChoice(): void {
 
 		$share = $this->createMock(IShare::class);
 		$node = $this->createMock(File::class);
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$owner = $this->createMock(IUser::class);
 		$storage = $this->createMock(Storage::class);
 
@@ -5591,7 +5591,7 @@ public function testUserAllowsDownloadWhenParentPermits(): void {
 
 		$share = $this->createMock(IShare::class);
 		$node = $this->createMock(File::class);
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$owner = $this->createMock(IUser::class);
 		$storage = $this->createMock(SharedStorage::class);
 		$originalShare = $this->createMock(IShare::class);
@@ -5622,7 +5622,7 @@ public function testWrapperStorageUnwrapped(): void {
 
 		$share = $this->createMock(IShare::class);
 		$node = $this->createMock(File::class);
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$owner = $this->createMock(IUser::class);
 		$wrapperStorage = $this->createMock(Wrapper::class);
 		$innerStorage = $this->createMock(SharedStorage::class);
diff --git a/apps/files_sharing/tests/External/ManagerTest.php b/apps/files_sharing/tests/External/ManagerTest.php
index 31ce7155704ce..e45d132bfdfcd 100644
--- a/apps/files_sharing/tests/External/ManagerTest.php
+++ b/apps/files_sharing/tests/External/ManagerTest.php
@@ -21,9 +21,9 @@
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\Federation\ICloudFederationFactory;
 use OCP\Federation\ICloudFederationProviderManager;
-use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
 use OCP\Files\ISetupManager;
+use OCP\Files\IUserFolder;
 use OCP\Files\NotFoundException;
 use OCP\Http\Client\IClient;
 use OCP\Http\Client\IClientService;
@@ -90,8 +90,8 @@ protected function setUp(): void {
 		$this->setupManager = $this->createMock(ISetupManager::class);
 		$this->rootFolder = $this->createMock(IRootFolder::class);
 		$this->rootFolder->method('getUserFolder')
-			->willReturnCallback(function (string $userId): Folder {
-				$folder = $this->createMock(Folder::class);
+			->willReturnCallback(function (string $userId): IUserFolder {
+				$folder = $this->createMock(IUserFolder::class);
 				$folder->method('get')
 					->willReturn($folder);
 				$folder->method('getNonExistingName')
diff --git a/apps/files_sharing/tests/TestCase.php b/apps/files_sharing/tests/TestCase.php
index 6b72ecb259cab..ce91ef910cf23 100644
--- a/apps/files_sharing/tests/TestCase.php
+++ b/apps/files_sharing/tests/TestCase.php
@@ -192,6 +192,7 @@ protected function loginHelper($user, $create = false, $password = false) {
 		Storage::getGlobalCache()->clearCache();
 		Server::get(IUserSession::class)->setUser(null);
 		Filesystem::tearDown();
+		\OC_User::setIncognitoMode(false);
 		Server::get(IUserSession::class)->login($user, $password);
 		\OC::$server->getUserFolder($user);
 
diff --git a/apps/files_trashbin/tests/Controller/PreviewControllerTest.php b/apps/files_trashbin/tests/Controller/PreviewControllerTest.php
index bb951c9c8c7b1..ef36142555c8f 100644
--- a/apps/files_trashbin/tests/Controller/PreviewControllerTest.php
+++ b/apps/files_trashbin/tests/Controller/PreviewControllerTest.php
@@ -17,6 +17,7 @@
 use OCP\Files\Folder;
 use OCP\Files\IMimeTypeDetector;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\SimpleFS\ISimpleFile;
 use OCP\IPreview;
 use OCP\IRequest;
@@ -81,7 +82,7 @@ public function testInvalidHeight(): void {
 	}
 
 	public function testValidPreview(): void {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userRoot = $this->createMock(Folder::class);
 		$trash = $this->createMock(Folder::class);
 
@@ -134,7 +135,7 @@ public function testValidPreview(): void {
 	}
 
 	public function testTrashFileNotFound(): void {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userRoot = $this->createMock(Folder::class);
 		$trash = $this->createMock(Folder::class);
 
@@ -158,7 +159,7 @@ public function testTrashFileNotFound(): void {
 	}
 
 	public function testTrashFolder(): void {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userRoot = $this->createMock(Folder::class);
 		$trash = $this->createMock(Folder::class);
 
diff --git a/apps/files_trashbin/tests/StorageTest.php b/apps/files_trashbin/tests/StorageTest.php
index de8df1d293218..2e5912e758275 100644
--- a/apps/files_trashbin/tests/StorageTest.php
+++ b/apps/files_trashbin/tests/StorageTest.php
@@ -23,6 +23,7 @@
 use OCP\Files\Cache\ICache;
 use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\Node;
 use OCP\Files\Storage\IStorage;
 use OCP\IUserManager;
@@ -574,7 +575,7 @@ public function testShouldMoveToTrash(string $mountPoint, string $path, bool $us
 		$logger = $this->getMockBuilder(LoggerInterface::class)->getMock();
 		$eventDispatcher = $this->createMock(IEventDispatcher::class);
 		$rootFolder = $this->createMock(IRootFolder::class);
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$node = $this->getMockBuilder(Node::class)->disableOriginalConstructor()->getMock();
 		$trashManager = $this->createMock(ITrashManager::class);
 		$event = $this->getMockBuilder(MoveToTrashEvent::class)->disableOriginalConstructor()->getMock();
diff --git a/apps/files_versions/lib/Storage.php b/apps/files_versions/lib/Storage.php
index fe9f91534fa01..88f075e55d723 100644
--- a/apps/files_versions/lib/Storage.php
+++ b/apps/files_versions/lib/Storage.php
@@ -889,15 +889,11 @@ public static function expire($filename, $uid) {
 				if ($softQuota) {
 					$root = Server::get(IRootFolder::class);
 					$userFolder = $root->getUserFolder($uid);
-					if (is_null($userFolder)) {
-						$availableSpace = 0;
+					$free = $quota - $userFolder->getSize(false); // remaining free space for user
+					if ($free > 0) {
+						$availableSpace = ($free * self::DEFAULTMAXSIZE / 100) - $versionsSize; // how much space can be used for versions
 					} else {
-						$free = $quota - $userFolder->getSize(false); // remaining free space for user
-						if ($free > 0) {
-							$availableSpace = ($free * self::DEFAULTMAXSIZE / 100) - $versionsSize; // how much space can be used for versions
-						} else {
-							$availableSpace = $free - $versionsSize;
-						}
+						$availableSpace = $free - $versionsSize;
 					}
 				} else {
 					$availableSpace = $quota;
diff --git a/apps/files_versions/tests/Command/CleanupTest.php b/apps/files_versions/tests/Command/CleanupTest.php
index 446b62f145d9d..c11a8805ad22a 100644
--- a/apps/files_versions/tests/Command/CleanupTest.php
+++ b/apps/files_versions/tests/Command/CleanupTest.php
@@ -12,8 +12,8 @@
 use OCA\Files_Versions\Command\CleanUp;
 use OCA\Files_Versions\Db\VersionsMapper;
 use OCP\Files\Cache\ICache;
-use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\Storage\IStorage;
 use OCP\UserInterface;
 use PHPUnit\Framework\MockObject\MockObject;
@@ -52,7 +52,7 @@ public function testDeleteVersions(bool $nodeExists): void {
 			->with('/testUser/files_versions')
 			->willReturn($nodeExists);
 
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userHomeStorage = $this->createMock(IStorage::class);
 		$userHomeStorageCache = $this->createMock(ICache::class);
 		$this->rootFolder->expects($this->once())
diff --git a/apps/files_versions/tests/Controller/PreviewControllerTest.php b/apps/files_versions/tests/Controller/PreviewControllerTest.php
index 542ea2b6b3485..7932f6399967c 100644
--- a/apps/files_versions/tests/Controller/PreviewControllerTest.php
+++ b/apps/files_versions/tests/Controller/PreviewControllerTest.php
@@ -15,6 +15,7 @@
 use OCP\Files\File;
 use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\NotFoundException;
 use OCP\Files\SimpleFS\ISimpleFile;
 use OCP\IPreview;
@@ -92,7 +93,7 @@ public function testInvalidVersion(): void {
 	}
 
 	public function testValidPreview(): void {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userRoot = $this->createMock(Folder::class);
 
 		$this->rootFolder->method('getUserFolder')
@@ -130,7 +131,7 @@ public function testValidPreview(): void {
 	}
 
 	public function testVersionNotFound(): void {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userRoot = $this->createMock(Folder::class);
 
 		$this->rootFolder->method('getUserFolder')
diff --git a/build/psalm-baseline.xml b/build/psalm-baseline.xml
index 47edd7bbcc739..a3af4fb8869df 100644
--- a/build/psalm-baseline.xml
+++ b/build/psalm-baseline.xml
@@ -502,6 +502,9 @@
     </UndefinedInterfaceMethod>
   </file>
   <file src="apps/dav/lib/Connector/Sabre/Directory.php">
+    <DeprecatedMethod>
+      <code><![CDATA[\OC_Helper::getStorageInfo($relativePath, $this->info, false)]]></code>
+    </DeprecatedMethod>
     <InternalMethod>
       <code><![CDATA[copy]]></code>
       <code><![CDATA[file_exists]]></code>
@@ -1255,6 +1258,7 @@
   </file>
   <file src="apps/files/lib/Controller/ApiController.php">
     <DeprecatedMethod>
+      <code><![CDATA[\OC_Helper::getStorageInfo($dir ?: '/')]]></code>
       <code><![CDATA[getUserValue]]></code>
       <code><![CDATA[setUserValue]]></code>
       <code><![CDATA[setUserValue]]></code>
@@ -1272,6 +1276,7 @@
   </file>
   <file src="apps/files/lib/Controller/ViewController.php">
     <DeprecatedMethod>
+      <code><![CDATA[\OC_Helper::getStorageInfo($dir, $rootInfo ?: null)]]></code>
       <code><![CDATA[getUserValue]]></code>
     </DeprecatedMethod>
   </file>
@@ -2045,6 +2050,7 @@
       <code><![CDATA[IAccountManager::PROPERTY_TWITTER]]></code>
     </DeprecatedConstant>
     <DeprecatedMethod>
+      <code><![CDATA[\OC_Helper::getStorageInfo('/', null, true, false)]]></code>
       <code><![CDATA[\OC_Util::tearDownFS()]]></code>
       <code><![CDATA[getUserValue]]></code>
       <code><![CDATA[getUserValue]]></code>
@@ -2212,6 +2218,7 @@
       <code><![CDATA[IAccountManager::PROPERTY_TWITTER]]></code>
     </DeprecatedConstant>
     <DeprecatedMethod>
+      <code><![CDATA[\OC_Helper::getStorageInfo('/')]]></code>
       <code><![CDATA[getUserValue]]></code>
       <code><![CDATA[getUserValue]]></code>
       <code><![CDATA[getUserValue]]></code>
@@ -3508,14 +3515,6 @@
       <code><![CDATA[$this->__call(__FUNCTION__, func_get_args())]]></code>
     </InvalidReturnStatement>
   </file>
-  <file src="lib/private/Files/Node/LazyUserFolder.php">
-    <LessSpecificReturnStatement>
-      <code><![CDATA[$node]]></code>
-    </LessSpecificReturnStatement>
-    <MoreSpecificReturnType>
-      <code><![CDATA[Folder]]></code>
-    </MoreSpecificReturnType>
-  </file>
   <file src="lib/private/Files/Node/Node.php">
     <InvalidNullableReturnType>
       <code><![CDATA[FileInfo]]></code>
@@ -3886,9 +3885,6 @@
     <InternalMethod>
       <code><![CDATA[getAbsolutePath]]></code>
     </InternalMethod>
-    <UndefinedInterfaceMethod>
-      <code><![CDATA[getQuota]]></code>
-    </UndefinedInterfaceMethod>
   </file>
   <file src="lib/private/legacy/OC_User.php">
     <UndefinedClass>
diff --git a/core/Command/User/Info.php b/core/Command/User/Info.php
index 4be0caefae355..03ec553e2313b 100644
--- a/core/Command/User/Info.php
+++ b/core/Command/User/Info.php
@@ -7,11 +7,13 @@
 namespace OC\Core\Command\User;
 
 use OC\Core\Command\Base;
+use OC\User\NoUserException;
+use OCP\Files\IRootFolder;
 use OCP\Files\ISetupManager;
-use OCP\Files\NotFoundException;
 use OCP\IGroupManager;
 use OCP\IUser;
 use OCP\IUserManager;
+use OCP\Server;
 use Stecman\Component\Symfony\Console\BashCompletion\CompletionContext;
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
@@ -84,20 +86,13 @@ private function formatLoginDate(int $timestamp): string {
 	 * @return array
 	 */
 	protected function getStorageInfo(IUser $user): array {
-		$this->setupManager->tearDown();
-		$this->setupManager->setupForUser($user);
+		$root = Server::get(IRootFolder::class);
 		try {
-			$storage = \OC_Helper::getStorageInfo('/');
-		} catch (NotFoundException $e) {
+			$userFolder = $root->getUserFolder($user->getUID());
+			return $userFolder->getUserQuota();
+		} catch (NoUserException) {
 			return [];
 		}
-		return [
-			'free' => $storage['free'],
-			'used' => $storage['used'],
-			'total' => $storage['total'],
-			'relative' => $storage['relative'],
-			'quota' => $storage['quota'],
-		];
 	}
 
 	/**
diff --git a/lib/composer/composer/autoload_classmap.php b/lib/composer/composer/autoload_classmap.php
index 93f5def20a52a..6d5615786adce 100644
--- a/lib/composer/composer/autoload_classmap.php
+++ b/lib/composer/composer/autoload_classmap.php
@@ -484,6 +484,7 @@
     'OCP\\Files\\IMimeTypeLoader' => $baseDir . '/lib/public/Files/IMimeTypeLoader.php',
     'OCP\\Files\\IRootFolder' => $baseDir . '/lib/public/Files/IRootFolder.php',
     'OCP\\Files\\ISetupManager' => $baseDir . '/lib/public/Files/ISetupManager.php',
+    'OCP\\Files\\IUserFolder' => $baseDir . '/lib/public/Files/IUserFolder.php',
     'OCP\\Files\\InvalidCharacterInPathException' => $baseDir . '/lib/public/Files/InvalidCharacterInPathException.php',
     'OCP\\Files\\InvalidContentException' => $baseDir . '/lib/public/Files/InvalidContentException.php',
     'OCP\\Files\\InvalidDirectoryException' => $baseDir . '/lib/public/Files/InvalidDirectoryException.php',
@@ -1765,6 +1766,7 @@
     'OC\\Files\\Node\\NonExistingFile' => $baseDir . '/lib/private/Files/Node/NonExistingFile.php',
     'OC\\Files\\Node\\NonExistingFolder' => $baseDir . '/lib/private/Files/Node/NonExistingFolder.php',
     'OC\\Files\\Node\\Root' => $baseDir . '/lib/private/Files/Node/Root.php',
+    'OC\\Files\\Node\\UserFolder' => $baseDir . '/lib/private/Files/Node/UserFolder.php',
     'OC\\Files\\Notify\\Change' => $baseDir . '/lib/private/Files/Notify/Change.php',
     'OC\\Files\\Notify\\RenameChange' => $baseDir . '/lib/private/Files/Notify/RenameChange.php',
     'OC\\Files\\ObjectStore\\AppdataPreviewObjectStoreStorage' => $baseDir . '/lib/private/Files/ObjectStore/AppdataPreviewObjectStoreStorage.php',
diff --git a/lib/composer/composer/autoload_static.php b/lib/composer/composer/autoload_static.php
index bc27a12cf46b6..9462e28f4211a 100644
--- a/lib/composer/composer/autoload_static.php
+++ b/lib/composer/composer/autoload_static.php
@@ -525,6 +525,7 @@ class ComposerStaticInit749170dad3f5e7f9ca158f5a9f04f6a2
         'OCP\\Files\\IMimeTypeLoader' => __DIR__ . '/../../..' . '/lib/public/Files/IMimeTypeLoader.php',
         'OCP\\Files\\IRootFolder' => __DIR__ . '/../../..' . '/lib/public/Files/IRootFolder.php',
         'OCP\\Files\\ISetupManager' => __DIR__ . '/../../..' . '/lib/public/Files/ISetupManager.php',
+        'OCP\\Files\\IUserFolder' => __DIR__ . '/../../..' . '/lib/public/Files/IUserFolder.php',
         'OCP\\Files\\InvalidCharacterInPathException' => __DIR__ . '/../../..' . '/lib/public/Files/InvalidCharacterInPathException.php',
         'OCP\\Files\\InvalidContentException' => __DIR__ . '/../../..' . '/lib/public/Files/InvalidContentException.php',
         'OCP\\Files\\InvalidDirectoryException' => __DIR__ . '/../../..' . '/lib/public/Files/InvalidDirectoryException.php',
@@ -1806,6 +1807,7 @@ class ComposerStaticInit749170dad3f5e7f9ca158f5a9f04f6a2
         'OC\\Files\\Node\\NonExistingFile' => __DIR__ . '/../../..' . '/lib/private/Files/Node/NonExistingFile.php',
         'OC\\Files\\Node\\NonExistingFolder' => __DIR__ . '/../../..' . '/lib/private/Files/Node/NonExistingFolder.php',
         'OC\\Files\\Node\\Root' => __DIR__ . '/../../..' . '/lib/private/Files/Node/Root.php',
+        'OC\\Files\\Node\\UserFolder' => __DIR__ . '/../../..' . '/lib/private/Files/Node/UserFolder.php',
         'OC\\Files\\Notify\\Change' => __DIR__ . '/../../..' . '/lib/private/Files/Notify/Change.php',
         'OC\\Files\\Notify\\RenameChange' => __DIR__ . '/../../..' . '/lib/private/Files/Notify/RenameChange.php',
         'OC\\Files\\ObjectStore\\AppdataPreviewObjectStoreStorage' => __DIR__ . '/../../..' . '/lib/private/Files/ObjectStore/AppdataPreviewObjectStoreStorage.php',
diff --git a/lib/private/Files/Node/Folder.php b/lib/private/Files/Node/Folder.php
index f103a34c9e92d..e7168082e67e2 100644
--- a/lib/private/Files/Node/Folder.php
+++ b/lib/private/Files/Node/Folder.php
@@ -530,7 +530,7 @@ public function getOrCreateFolder(string $path, int $maxRetries = 5): IFolder {
 					return $folder;
 				}
 			} catch (NotFoundException) {
-				$folder = dirname($path) === '.' ? $this : $this->get(dirname($path));
+				$folder = in_array(dirname($path), ['.','/']) ? $this : $this->get(dirname($path));
 				if (!($folder instanceof Folder)) {
 					throw new NotPermittedException("Unable to create folder $path. Parent is not a directory.");
 				}
diff --git a/lib/private/Files/Node/LazyFolder.php b/lib/private/Files/Node/LazyFolder.php
index 23858bb0679af..e3451a176b456 100644
--- a/lib/private/Files/Node/LazyFolder.php
+++ b/lib/private/Files/Node/LazyFolder.php
@@ -313,13 +313,6 @@ public function getName() {
 		return $this->__call(__FUNCTION__, func_get_args());
 	}
 
-	/**
-	 * @inheritDoc
-	 */
-	public function getUserFolder($userId) {
-		return $this->__call(__FUNCTION__, func_get_args());
-	}
-
 	public function getMimetype(): string {
 		if (isset($this->data['mimetype'])) {
 			return $this->data['mimetype'];
diff --git a/lib/private/Files/Node/LazyRoot.php b/lib/private/Files/Node/LazyRoot.php
index 8920a2f68f67e..b99baacb0cd95 100644
--- a/lib/private/Files/Node/LazyRoot.php
+++ b/lib/private/Files/Node/LazyRoot.php
@@ -9,6 +9,7 @@
 
 use OCP\Files\Cache\ICacheEntry;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\Mount\IMountPoint;
 use OCP\Files\Node as INode;
 
@@ -33,7 +34,7 @@ protected function getRootFolder(): IRootFolder {
 		return $folder;
 	}
 
-	public function getUserFolder($userId) {
+	public function getUserFolder(string $userId): IUserFolder {
 		return $this->__call(__FUNCTION__, func_get_args());
 	}
 
diff --git a/lib/private/Files/Node/LazyUserFolder.php b/lib/private/Files/Node/LazyUserFolder.php
index 5ac74e2705e21..be5d46a53139c 100644
--- a/lib/private/Files/Node/LazyUserFolder.php
+++ b/lib/private/Files/Node/LazyUserFolder.php
@@ -8,18 +8,19 @@
  */
 namespace OC\Files\Node;
 
+use OC\Files\View;
 use OCP\Constants;
-use OCP\Files\File;
 use OCP\Files\FileInfo;
 use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\Mount\IMountManager;
-use OCP\Files\NotFoundException;
+use OCP\ICacheFactory;
+use OCP\IConfig;
 use OCP\IUser;
 use OCP\Server;
-use Psr\Log\LoggerInterface;
 
-class LazyUserFolder extends LazyFolder {
+class LazyUserFolder extends LazyFolder implements IUserFolder {
 	private string $path;
 
 	public function __construct(
@@ -44,23 +45,18 @@ public function __construct(
 
 		parent::__construct(
 			$rootFolder,
-			function () use ($user): Folder {
-				try {
-					$node = $this->getRootFolder()->get($this->path);
-					if ($node instanceof File) {
-						$e = new \RuntimeException();
-						Server::get(LoggerInterface::class)->error('User root storage is not a folder: ' . $this->path, [
-							'exception' => $e,
-						]);
-						throw $e;
-					}
-					return $node;
-				} catch (NotFoundException $e) {
-					if (!$this->getRootFolder()->nodeExists('/' . $user->getUID())) {
-						$this->getRootFolder()->newFolder('/' . $user->getUID());
-					}
-					return $this->getRootFolder()->newFolder($this->path);
-				}
+			function () use ($user): UserFolder {
+				$root = $this->getRootFolder();
+				$realFolder = $root->getOrCreateFolder('/' . $user->getUID() . '/files', maxRetries: 1);
+				return new UserFolder(
+					$root,
+					new View(),
+					$realFolder->getPath(),
+					null,
+					Server::get(IConfig::class),
+					$user,
+					Server::get(ICacheFactory::class),
+				);
 			},
 			$data,
 		);
@@ -76,4 +72,8 @@ public function getMountPoint() {
 		}
 		return $mountPoint;
 	}
+
+	public function getUserQuota(bool $useCache = true): array {
+		return $this->__call(__FUNCTION__, func_get_args());
+	}
 }
diff --git a/lib/private/Files/Node/Root.php b/lib/private/Files/Node/Root.php
index 0c121dc8b0527..471cda1a4369e 100644
--- a/lib/private/Files/Node/Root.php
+++ b/lib/private/Files/Node/Root.php
@@ -27,6 +27,7 @@
 use OCP\Files\Config\IUserMountCache;
 use OCP\Files\Events\Node\FilesystemTornDownEvent;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\Mount\IMountPoint;
 use OCP\Files\Node as INode;
 use OCP\Files\NotFoundException;
@@ -34,6 +35,7 @@
 use OCP\IAppConfig;
 use OCP\ICache;
 use OCP\ICacheFactory;
+use OCP\IConfig;
 use OCP\IUser;
 use OCP\IUserManager;
 use OCP\Server;
@@ -72,7 +74,7 @@ public function __construct(
 		private LoggerInterface $logger,
 		private IUserManager $userManager,
 		IEventDispatcher $eventDispatcher,
-		ICacheFactory $cacheFactory,
+		private ICacheFactory $cacheFactory,
 		IAppConfig $appConfig,
 	) {
 		parent::__construct($this, $view, '');
@@ -298,12 +300,10 @@ public function getName() {
 	/**
 	 * Returns a view to user's files folder
 	 *
-	 * @param string $userId user ID
-	 * @return \OCP\Files\Folder
 	 * @throws NoUserException
 	 * @throws NotPermittedException
 	 */
-	public function getUserFolder($userId) {
+	public function getUserFolder(string $userId): IUserFolder {
 		$userObject = $this->userManager->get($userId);
 
 		if (is_null($userObject)) {
@@ -325,17 +325,16 @@ public function getUserFolder($userId) {
 
 		if (!$this->userFolderCache->hasKey($userId)) {
 			if ($this->mountManager->getSetupManager()->isSetupComplete($userObject)) {
-				try {
-					$folder = $this->get('/' . $userId . '/files');
-					if (!$folder instanceof \OCP\Files\Folder) {
-						throw new \Exception("Account folder for \"$userId\" exists as a file");
-					}
-				} catch (NotFoundException $e) {
-					if (!$this->nodeExists('/' . $userId)) {
-						$this->newFolder('/' . $userId);
-					}
-					$folder = $this->newFolder('/' . $userId . '/files');
-				}
+				$realFolder = $this->getOrCreateFolder('/' . $userId . '/files', maxRetries: 1);
+				$folder = new UserFolder(
+					$this,
+					$this->view,
+					$realFolder->getPath(),
+					null,
+					Server::get(IConfig::class),
+					$userObject,
+					$this->cacheFactory,
+				);
 			} else {
 				$folder = new LazyUserFolder($this, $userObject, $this->mountManager, $this->useDefaultHomeFoldersPermissions);
 			}
diff --git a/lib/private/Files/Node/UserFolder.php b/lib/private/Files/Node/UserFolder.php
new file mode 100644
index 0000000000000..a7b18e92e1ebf
--- /dev/null
+++ b/lib/private/Files/Node/UserFolder.php
@@ -0,0 +1,92 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OC\Files\Node;
+
+use OC\Files\Storage\Wrapper\Quota;
+use OC\Files\View;
+use OCP\Files\Folder as IFolder;
+use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
+use OCP\ICacheFactory;
+use OCP\IConfig;
+use OCP\IUser;
+
+/**
+ * @since 32.0.0
+ */
+class UserFolder extends Folder implements IUserFolder {
+
+	public function __construct(
+		IRootFolder $root,
+		View $view,
+		string $path,
+		?IFolder $parent,
+		protected IConfig $config,
+		protected IUser $user,
+		protected ICacheFactory $cacheFactory,
+	) {
+		parent::__construct($root, $view, $path, parent: $parent);
+	}
+
+	public function getUserQuota(bool $useCache = true): array {
+		// return from cache if requested and we already cached it
+		$memcache = $this->cacheFactory->createLocal('storage_info');
+		if ($useCache) {
+			$cached = $memcache->get($this->getPath());
+			if ($cached) {
+				return $cached;
+			}
+		}
+
+		$quotaIncludeExternalStorage = $this->config->getSystemValueBool('quota_include_external_storage');
+		$rootInfo = $this->getFileInfo($quotaIncludeExternalStorage);
+
+		/** @var int|float $used */
+		$used = max($rootInfo->getSize(), 0.0);
+		/** @var int|float $quota */
+		$quota = \OCP\Files\FileInfo::SPACE_UNLIMITED;
+		$mount = $rootInfo->getMountPoint();
+		$storage = $mount->getStorage();
+		if ($storage === null) {
+			throw new \RuntimeException('Storage returned from mount point is null.');
+		}
+
+		if ($storage->instanceOfStorage(Quota::class)) {
+			$quota = $storage->getQuota();
+		} elseif ($quotaIncludeExternalStorage) {
+			$quota = $this->user->getQuotaBytes();
+		}
+
+		$free = $storage->free_space($rootInfo->getInternalPath());
+		if (is_bool($free)) {
+			$free = 0.0;
+		}
+
+		if ($free >= 0) {
+			$total = $free + $used;
+		} else {
+			$total = $free; //either unknown or unlimited
+		}
+
+		$relative = $total > 0
+			? $used / $total
+			: 0;
+		$this->config->setUserValue($this->user->getUID(), 'files', 'lastSeenQuotaUsage', (string)$relative);
+
+		$info = [
+			'free' => $free,
+			'used' => $used,
+			'quota' => $quota,
+			'total' => $total,
+		];
+		$memcache->set($this->getPath(), $info, 5 * 60);
+
+		return $info;
+	}
+
+}
diff --git a/lib/private/User/User.php b/lib/private/User/User.php
index 8de3486a9b99a..b1b0923e37381 100644
--- a/lib/private/User/User.php
+++ b/lib/private/User/User.php
@@ -15,6 +15,7 @@
 use OCP\Comments\ICommentsManager;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\Files\FileInfo;
+use OCP\Files\IRootFolder;
 use OCP\Group\Events\BeforeUserRemovedEvent;
 use OCP\Group\Events\UserRemovedEvent;
 use OCP\IAvatarManager;
@@ -573,7 +574,11 @@ public function setQuota($quota): void {
 			$this->config->setUserValue($this->uid, 'files', 'quota', $quota);
 			$this->triggerChange('quota', $quota, $oldQuota);
 		}
-		\OC_Helper::clearStorageInfo('/' . $this->uid . '/files');
+
+		// Refresh the quota cache
+		$root = Server::get(IRootFolder::class);
+		$userFolder = $root->getUserFolder($this->uid);
+		$userFolder->getUserQuota(false);
 	}
 
 	public function getManagerUids(): array {
diff --git a/lib/private/legacy/OC_Helper.php b/lib/private/legacy/OC_Helper.php
index 3dc7470811dbc..4c31cf5a5e7b1 100644
--- a/lib/private/legacy/OC_Helper.php
+++ b/lib/private/legacy/OC_Helper.php
@@ -145,6 +145,7 @@ public static function findBinaryPath(string $program): ?string {
 	 * @psalm-suppress LessSpecificReturnStatement Legacy code outputs weird types - manually validated that they are correct
 	 * @return StorageInfo
 	 * @throws NotFoundException
+	 * @deprecated 33.0.0 use \OCP\Files\IUserFolder::getUserQuota
 	 */
 	public static function getStorageInfo($path, $rootInfo = null, $includeMountPoints = true, $useCache = true) {
 		if (!self::$cacheFactory) {
@@ -207,7 +208,7 @@ public static function getStorageInfo($path, $rootInfo = null, $includeMountPoin
 
 		// TODO: need a better way to get total space from storage
 		if ($sourceStorage->instanceOfStorage('\OC\Files\Storage\Wrapper\Quota')) {
-			/** @var Quota $storage */
+			/** @var Quota $sourceStorage */
 			$quota = $sourceStorage->getQuota();
 		}
 		try {
@@ -329,6 +330,9 @@ private static function getGlobalStorageInfo(int|float $quota, IUser $user, IMou
 		];
 	}
 
+	/**
+	 * @deprecated 33.0.0
+	 */
 	public static function clearStorageInfo(string $absolutePath): void {
 		/** @var ICacheFactory $cacheFactory */
 		$cacheFactory = Server::get(ICacheFactory::class);
diff --git a/lib/public/Files/IRootFolder.php b/lib/public/Files/IRootFolder.php
index fb8532f8c8153..494c7bb42ea10 100644
--- a/lib/public/Files/IRootFolder.php
+++ b/lib/public/Files/IRootFolder.php
@@ -1,14 +1,18 @@
 <?php
 
+declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
  * SPDX-License-Identifier: AGPL-3.0-only
  */
+
 namespace OCP\Files;
 
 use OC\Hooks\Emitter;
 use OC\User\NoUserException;
+use OCP\AppFramework\Attribute\Consumable;
 use OCP\Files\Cache\ICacheEntry;
 use OCP\Files\Mount\IMountPoint;
 use OCP\Files\Node as INode;
@@ -18,18 +22,20 @@
  *
  * @since 8.0.0
  */
+#[Consumable(since: '8.0.0')]
 interface IRootFolder extends Folder, Emitter {
 	/**
 	 * Returns a view to user's files folder
 	 *
 	 * @param string $userId user ID
-	 * @return Folder
+	 * @return IUserFolder
 	 * @throws NoUserException
 	 * @throws NotPermittedException
 	 *
 	 * @since 8.2.0
+	 * @since 33.0.0 returns OCP\Files\IUserFolder instead of OCP\Files\Folder
 	 */
-	public function getUserFolder($userId);
+	public function getUserFolder(string $userId): IUserFolder;
 
 	/**
 	 * Get a file or folder by fileid, inside a parent path
diff --git a/lib/public/Files/IUserFolder.php b/lib/public/Files/IUserFolder.php
new file mode 100644
index 0000000000000..007d354c5677f
--- /dev/null
+++ b/lib/public/Files/IUserFolder.php
@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OCP\Files;
+
+use OCP\AppFramework\Attribute\Consumable;
+
+/**
+ * @since 33.0.0
+ */
+#[Consumable(since: '33.0.0')]
+interface IUserFolder extends Folder {
+
+	/**
+	 * @param bool $useCache - Use the cached value if available instead of recalculate.
+	 * @return array{used: int|float, free: int|float, total: int|float, quota: int|float}
+	 * @since 33.0.0
+	 */
+	public function getUserQuota(bool $useCache = true): array;
+
+}
diff --git a/tests/Core/Controller/AvatarControllerTest.php b/tests/Core/Controller/AvatarControllerTest.php
index 4d5da66014da3..785090cbf07e6 100644
--- a/tests/Core/Controller/AvatarControllerTest.php
+++ b/tests/Core/Controller/AvatarControllerTest.php
@@ -24,6 +24,7 @@ function is_uploaded_file($filename) {
 use OCP\AppFramework\Http;
 use OCP\Files\File;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\NotFoundException;
 use OCP\Files\NotPermittedException;
 use OCP\Files\SimpleFS\ISimpleFile;
@@ -370,7 +371,7 @@ public function testPostAvatarFromFile(): void {
 		$file->expects($this->once())
 			->method('getMimeType')
 			->willReturn('image/jpeg');
-		$userFolder = $this->getMockBuilder('OCP\Files\Folder')->getMock();
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')->with('userid')->willReturn($userFolder);
 		$userFolder->method('get')->willReturn($file);
 
@@ -386,7 +387,7 @@ public function testPostAvatarFromFile(): void {
 	 */
 	public function testPostAvatarFromNoFile(): void {
 		$file = $this->getMockBuilder('OCP\Files\Node')->getMock();
-		$userFolder = $this->getMockBuilder('OCP\Files\Folder')->getMock();
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')->with('userid')->willReturn($userFolder);
 		$userFolder
 			->method('get')
@@ -408,7 +409,7 @@ public function testPostAvatarInvalidType(): void {
 		$file->expects($this->exactly(2))
 			->method('getMimeType')
 			->willReturn('text/plain');
-		$userFolder = $this->getMockBuilder('OCP\Files\Folder')->getMock();
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')->with('userid')->willReturn($userFolder);
 		$userFolder->method('get')->willReturn($file);
 
@@ -425,7 +426,7 @@ public function testPostAvatarNotPermittedException(): void {
 		$file->expects($this->once())
 			->method('getMimeType')
 			->willReturn('image/jpeg');
-		$userFolder = $this->getMockBuilder('OCP\Files\Folder')->getMock();
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')->with('userid')->willReturn($userFolder);
 		$userFolder->method('get')->willReturn($file);
 
diff --git a/tests/Core/Controller/PreviewControllerTest.php b/tests/Core/Controller/PreviewControllerTest.php
index 5a6cd1fba0a53..a8ca55a392bb9 100644
--- a/tests/Core/Controller/PreviewControllerTest.php
+++ b/tests/Core/Controller/PreviewControllerTest.php
@@ -13,6 +13,7 @@
 use OCP\Files\File;
 use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\NotFoundException;
 use OCP\Files\SimpleFS\ISimpleFile;
 use OCP\Files\Storage\ISharedStorage;
@@ -72,7 +73,7 @@ public function testInvalidHeight(): void {
 	}
 
 	public function testFileNotFound(): void {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->equalTo($this->userId))
 			->willReturn($userFolder);
@@ -88,7 +89,7 @@ public function testFileNotFound(): void {
 	}
 
 	public function testNotAFile(): void {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->equalTo($this->userId))
 			->willReturn($userFolder);
@@ -105,7 +106,7 @@ public function testNotAFile(): void {
 	}
 
 	public function testNoPreviewAndNoIcon(): void {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->equalTo($this->userId))
 			->willReturn($userFolder);
@@ -126,7 +127,7 @@ public function testNoPreviewAndNoIcon(): void {
 	}
 
 	public function testNoPreview() {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->equalTo($this->userId))
 			->willReturn($userFolder);
@@ -157,7 +158,7 @@ public function testNoPreview() {
 		$this->assertEquals($expected, $res);
 	}
 	public function testFileWithoutReadPermission() {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->equalTo($this->userId))
 			->willReturn($userFolder);
@@ -181,7 +182,7 @@ public function testFileWithoutReadPermission() {
 	}
 
 	public function testFileWithoutDownloadPermission() {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->equalTo($this->userId))
 			->willReturn($userFolder);
@@ -221,7 +222,7 @@ public function testFileWithoutDownloadPermission() {
 	}
 
 	public function testFileWithoutDownloadPermissionButHeader() {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->equalTo($this->userId))
 			->willReturn($userFolder);
@@ -274,7 +275,7 @@ public function testFileWithoutDownloadPermissionButHeader() {
 	}
 
 	public function testValidPreview(): void {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->equalTo($this->userId))
 			->willReturn($userFolder);
@@ -313,7 +314,7 @@ public function testValidPreview(): void {
 	}
 
 	public function testValidPreviewOfShare() {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')
 			->with($this->equalTo($this->userId))
 			->willReturn($userFolder);
diff --git a/tests/lib/DirectEditing/ManagerTest.php b/tests/lib/DirectEditing/ManagerTest.php
index f519aeb4ce1d2..100652e1cee99 100644
--- a/tests/lib/DirectEditing/ManagerTest.php
+++ b/tests/lib/DirectEditing/ManagerTest.php
@@ -17,6 +17,7 @@
 use OCP\Encryption\IManager;
 use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\IDBConnection;
 use OCP\IL10N;
 use OCP\IUser;
@@ -107,10 +108,7 @@ class ManagerTest extends TestCase {
 	 * @var MockObject|IRootFolder
 	 */
 	private $rootFolder;
-	/**
-	 * @var MockObject|Folder
-	 */
-	private $userFolder;
+	private IUserFolder&MockObject $userFolder;
 	/**
 	 * @var MockObject|IL10N
 	 */
@@ -129,7 +127,7 @@ protected function setUp(): void {
 		$this->connection = Server::get(IDBConnection::class);
 		$this->userSession = $this->createMock(IUserSession::class);
 		$this->rootFolder = $this->createMock(IRootFolder::class);
-		$this->userFolder = $this->createMock(Folder::class);
+		$this->userFolder = $this->createMock(IUserFolder::class);
 		$this->l10n = $this->createMock(IL10N::class);
 		$this->encryptionManager = $this->createMock(IManager::class);
 
diff --git a/tests/lib/Files/Node/RootTest.php b/tests/lib/Files/Node/RootTest.php
index 3821b6943b15b..0dee1a6dc1e79 100644
--- a/tests/lib/Files/Node/RootTest.php
+++ b/tests/lib/Files/Node/RootTest.php
@@ -10,7 +10,6 @@
 
 use OC\Files\FileInfo;
 use OC\Files\Mount\Manager;
-use OC\Files\Node\Folder;
 use OC\Files\Node\Root;
 use OC\Files\Storage\Storage;
 use OC\Files\View;
@@ -19,6 +18,7 @@
 use OCP\Cache\CappedMemoryCache;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\Files\Config\IUserMountCache;
+use OCP\Files\IUserFolder;
 use OCP\Files\NotFoundException;
 use OCP\Files\NotPermittedException;
 use OCP\IAppConfig;
@@ -210,7 +210,7 @@ public function testGetUserFolder(): void {
 			->expects($this->once())
 			->method('hasKey')
 			->willReturn(true);
-		$folder = $this->createMock(Folder::class);
+		$folder = $this->createMock(IUserFolder::class);
 		$cappedMemoryCache
 			->expects($this->once())
 			->method('get')
diff --git a/tests/lib/Files/Template/TemplateManagerTest.php b/tests/lib/Files/Template/TemplateManagerTest.php
index 431b032594c14..bba36eb18db73 100644
--- a/tests/lib/Files/Template/TemplateManagerTest.php
+++ b/tests/lib/Files/Template/TemplateManagerTest.php
@@ -17,6 +17,7 @@
 use OCP\Files\Folder;
 use OCP\Files\GenericFileException;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\NotFoundException;
 use OCP\IConfig;
 use OCP\IDBConnection;
@@ -93,7 +94,7 @@ public function testCreateFromTemplateShoudValidateFilename(): void {
 		$fileDirectory = '/';
 		$filePath = $fileDirectory . str_repeat('a', 251);
 
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userFolder->method('get')
 			->willReturnCallback(function ($path) use ($filePath, $fileDirectory) {
 				if ($path === $filePath) {
diff --git a/tests/lib/Repair/Owncloud/CleanPreviewsBackgroundJobTest.php b/tests/lib/Repair/Owncloud/CleanPreviewsBackgroundJobTest.php
index fc88ee5d226e1..caadb221f188d 100644
--- a/tests/lib/Repair/Owncloud/CleanPreviewsBackgroundJobTest.php
+++ b/tests/lib/Repair/Owncloud/CleanPreviewsBackgroundJobTest.php
@@ -11,6 +11,7 @@
 use OCP\BackgroundJob\IJobList;
 use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\NotFoundException;
 use OCP\Files\NotPermittedException;
 use OCP\IUserManager;
@@ -48,7 +49,7 @@ public function setUp(): void {
 	}
 
 	public function testCleanupPreviewsUnfinished(): void {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userRoot = $this->createMock(Folder::class);
 		$thumbnailFolder = $this->createMock(Folder::class);
 
@@ -96,7 +97,7 @@ public function testCleanupPreviewsUnfinished(): void {
 	}
 
 	public function testCleanupPreviewsFinished(): void {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userRoot = $this->createMock(Folder::class);
 		$thumbnailFolder = $this->createMock(Folder::class);
 
@@ -161,7 +162,7 @@ public function testNoUserFolder(): void {
 	}
 
 	public function testNoThumbnailFolder(): void {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userRoot = $this->createMock(Folder::class);
 
 		$this->rootFolder->method('getUserFolder')
@@ -189,7 +190,7 @@ public function testNoThumbnailFolder(): void {
 	}
 
 	public function testNotPermittedToDelete(): void {
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userRoot = $this->createMock(Folder::class);
 		$thumbnailFolder = $this->createMock(Folder::class);
 
diff --git a/tests/lib/Share20/DefaultShareProviderTest.php b/tests/lib/Share20/DefaultShareProviderTest.php
index aa5454bbe384f..1ab4ac2336903 100644
--- a/tests/lib/Share20/DefaultShareProviderTest.php
+++ b/tests/lib/Share20/DefaultShareProviderTest.php
@@ -20,6 +20,7 @@
 use OCP\Files\File;
 use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\IConfig;
 use OCP\IDBConnection;
 use OCP\IGroup;
@@ -217,7 +218,7 @@ public function testGetShareByIdUserShare(): void {
 		$shareOwner->method('getUID')->willReturn('shareOwner');
 
 		$ownerPath = $this->createMock(File::class);
-		$shareOwnerFolder = $this->createMock(Folder::class);
+		$shareOwnerFolder = $this->createMock(IUserFolder::class);
 		$shareOwnerFolder->method('getFirstNodeById')->with(42)->willReturn($ownerPath);
 
 		$this->rootFolder
@@ -295,7 +296,7 @@ public function testGetShareByIdLazy2(): void {
 
 		$ownerPath = $this->createMock(File::class);
 
-		$shareOwnerFolder = $this->createMock(Folder::class);
+		$shareOwnerFolder = $this->createMock(IUserFolder::class);
 		$shareOwnerFolder->method('getFirstNodeById')->with(42)->willReturn($ownerPath);
 
 		$this->rootFolder
@@ -339,7 +340,7 @@ public function testGetShareByIdGroupShare(): void {
 		$id = $qb->getLastInsertId();
 
 		$ownerPath = $this->createMock(Folder::class);
-		$shareOwnerFolder = $this->createMock(Folder::class);
+		$shareOwnerFolder = $this->createMock(IUserFolder::class);
 		$shareOwnerFolder->method('getFirstNodeById')->with(42)->willReturn($ownerPath);
 
 		$this->rootFolder
@@ -379,8 +380,9 @@ public function testGetShareByIdUserGroupShare(): void {
 		$node->method('getId')->willReturn(42);
 		$node->method('getName')->willReturn('myTarget');
 
-		$this->rootFolder->method('getUserFolder')->with('user0')->willReturnSelf();
-		$this->rootFolder->method('getFirstNodeById')->willReturn($node);
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getFirstNodeById')->willReturn($node);
+		$this->rootFolder->method('getUserFolder')->with('user0')->willReturn($userFolder);
 
 		$this->userManager->method('get')->willReturnMap([
 			['user0', $user0],
@@ -424,7 +426,7 @@ public function testGetShareByIdLinkShare(): void {
 		$id = $qb->getLastInsertId();
 
 		$ownerPath = $this->createMock(Folder::class);
-		$shareOwnerFolder = $this->createMock(Folder::class);
+		$shareOwnerFolder = $this->createMock(IUserFolder::class);
 		$shareOwnerFolder->method('getFirstNodeById')->with(42)->willReturn($ownerPath);
 
 		$this->rootFolder
@@ -647,7 +649,7 @@ public function testGetChildren(): void {
 		$qb->executeStatement();
 
 		$ownerPath = $this->createMock(Folder::class);
-		$ownerFolder = $this->createMock(Folder::class);
+		$ownerFolder = $this->createMock(IUserFolder::class);
 		$ownerFolder->method('getFirstNodeById')->willReturn($ownerPath);
 
 		$this->rootFolder
@@ -696,8 +698,8 @@ public function testCreateUserShare(): void {
 		$path->method('getId')->willReturn(100);
 		$path->method('getOwner')->willReturn($shareOwner);
 
-		$ownerFolder = $this->createMock(Folder::class);
-		$userFolder = $this->createMock(Folder::class);
+		$ownerFolder = $this->createMock(IUserFolder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder
 			->method('getUserFolder')
 			->willReturnMap([
@@ -768,8 +770,8 @@ public function testCreateGroupShare(): void {
 		$path->method('getId')->willReturn(100);
 		$path->method('getOwner')->willReturn($shareOwner);
 
-		$ownerFolder = $this->createMock(Folder::class);
-		$userFolder = $this->createMock(Folder::class);
+		$ownerFolder = $this->createMock(IUserFolder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder
 			->method('getUserFolder')
 			->willReturnMap([
@@ -838,8 +840,8 @@ public function testCreateLinkShare(): void {
 		$path->method('getId')->willReturn(100);
 		$path->method('getOwner')->willReturn($shareOwner);
 
-		$ownerFolder = $this->createMock(Folder::class);
-		$userFolder = $this->createMock(Folder::class);
+		$ownerFolder = $this->createMock(IUserFolder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder
 			->method('getUserFolder')
 			->willReturnMap([
@@ -905,8 +907,9 @@ public function testGetShareByToken(): void {
 
 		$file = $this->createMock(File::class);
 
-		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturnSelf();
-		$this->rootFolder->method('getFirstNodeById')->with(42)->willReturn($file);
+		$shareOwnerFolder = $this->createMock(IUserFolder::class);
+		$shareOwnerFolder->method('getFirstNodeById')->with(42)->willReturn($file);
+		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturn($shareOwnerFolder);
 
 		$share = $this->provider->getShareByToken('secrettoken');
 		$this->assertEquals($id, $share->getId());
@@ -944,8 +947,9 @@ public function testGetShareByTokenNullLabel(): void {
 
 		$file = $this->createMock(File::class);
 
-		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturnSelf();
-		$this->rootFolder->method('getFirstNodeById')->with(42)->willReturn($file);
+		$shareOwnerFolder = $this->createMock(IUserFolder::class);
+		$shareOwnerFolder->method('getFirstNodeById')->with(42)->willReturn($file);
+		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturn($shareOwnerFolder);
 
 		$share = $this->provider->getShareByToken('secrettoken');
 		$this->assertEquals($id, $share->getId());
@@ -1027,8 +1031,9 @@ public function testGetSharedWithUser($storageStringId, $fileName1, $fileName2):
 		$this->assertEquals(1, $qb->executeStatement());
 
 		$file = $this->createMock(File::class);
-		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturnSelf();
-		$this->rootFolder->method('getFirstNodeById')->with($fileId)->willReturn($file);
+		$shareOwnerFolder = $this->createMock(IUserFolder::class);
+		$shareOwnerFolder->method('getFirstNodeById')->with($fileId)->willReturn($file);
+		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturn($shareOwnerFolder);
 
 		$share = $this->provider->getSharedWith('sharedWith', IShare::TYPE_USER, null, 1, 0);
 		$this->assertCount(1, $share);
@@ -1228,8 +1233,9 @@ public function testGetSharedWithUserWithNode($storageStringId, $fileName1, $fil
 		$file = $this->createMock(File::class);
 		$file->method('getId')->willReturn($fileId2);
 
-		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getFirstNodeById')->with($fileId2)->willReturn($file);
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getFirstNodeById')->with($fileId2)->willReturn($file);
+		$this->rootFolder->method('getUserFolder')->with('user1')->willReturn($userFolder);
 
 		$share = $this->provider->getSharedWith('user0', IShare::TYPE_USER, $file, -1, 0);
 		$this->assertCount(1, $share);
@@ -1269,8 +1275,9 @@ public function testGetSharedWithGroupWithNode($storageStringId, $fileName1, $fi
 
 		$node = $this->createMock(Folder::class);
 		$node->method('getId')->willReturn($fileId2);
-		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getFirstNodeById')->with($fileId2)->willReturn($node);
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getFirstNodeById')->with($fileId2)->willReturn($node);
+		$this->rootFolder->method('getUserFolder')->with('user1')->willReturn($userFolder);
 
 		$share = $this->provider->getSharedWith('user0', IShare::TYPE_GROUP, $node, -1, 0);
 		$this->assertCount(1, $share);
@@ -1318,8 +1325,9 @@ public function testGetSharedWithWithDeletedFile($shareType, $trashed): void {
 		$this->assertEquals(1, $qb->executeStatement());
 
 		$file = $this->createMock(File::class);
-		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturnSelf();
-		$this->rootFolder->method('getFirstNodeById')->with($deletedFileId)->willReturn($file);
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getFirstNodeById')->with($deletedFileId)->willReturn($file);
+		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturn($userFolder);
 
 		$groups = [];
 		foreach (range(0, 100) as $i) {
@@ -1430,8 +1438,9 @@ public function testGetSharesNode(): void {
 
 		$file = $this->createMock(File::class);
 		$file->method('getId')->willReturn(42);
-		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturnSelf();
-		$this->rootFolder->method('getFirstNodeById')->with(42)->willReturn($file);
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getFirstNodeById')->with(42)->willReturn($file);
+		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturn($userFolder);
 
 		$share = $this->provider->getSharesBy('sharedBy', IShare::TYPE_USER, $file, false, 1, 0);
 		$this->assertCount(1, $share);
@@ -1480,8 +1489,9 @@ public function testGetSharesReshare(): void {
 
 		$file = $this->createMock(File::class);
 		$file->method('getId')->willReturn(42);
-		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturnSelf();
-		$this->rootFolder->method('getFirstNodeById')->with(42)->willReturn($file);
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getFirstNodeById')->with(42)->willReturn($file);
+		$this->rootFolder->method('getUserFolder')->with('shareOwner')->willReturn($userFolder);
 
 		$shares = $this->provider->getSharesBy('shareOwner', IShare::TYPE_USER, null, true, -1, 0);
 		$this->assertCount(2, $shares);
@@ -1540,8 +1550,9 @@ public function testDeleteFromSelfGroupNoCustomShare(): void {
 		$file = $this->createMock(File::class);
 		$file->method('getId')->willReturn(1);
 
-		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getFirstNodeById')->with(1)->willReturn($file);
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getFirstNodeById')->with(1)->willReturn($file);
+		$this->rootFolder->method('getUserFolder')->with('user1')->willReturn($userFolder);
 
 		$share = $this->provider->getShareById($id);
 
@@ -1612,8 +1623,9 @@ public function testDeleteFromSelfGroupAlreadyCustomShare(): void {
 		$file = $this->createMock(File::class);
 		$file->method('getId')->willReturn(1);
 
-		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getFirstNodeById')->with(1)->willReturn($file);
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getFirstNodeById')->with(1)->willReturn($file);
+		$this->rootFolder->method('getUserFolder')->with('user1')->willReturn($userFolder);
 
 		$share = $this->provider->getShareById($id);
 
@@ -1670,8 +1682,9 @@ public function testDeleteFromSelfGroupUserNotInGroup(): void {
 		$file = $this->createMock(File::class);
 		$file->method('getId')->willReturn(1);
 
-		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getFirstNodeById')->with(1)->willReturn($file);
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getFirstNodeById')->with(1)->willReturn($file);
+		$this->rootFolder->method('getUserFolder')->with('user1')->willReturn($userFolder);
 
 		$share = $this->provider->getShareById($id);
 
@@ -1712,8 +1725,9 @@ public function testDeleteFromSelfGroupDoesNotExist(): void {
 		$file = $this->createMock(File::class);
 		$file->method('getId')->willReturn(1);
 
-		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getFirstNodeById')->with(1)->willReturn($file);
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getFirstNodeById')->with(1)->willReturn($file);
+		$this->rootFolder->method('getUserFolder')->with('user1')->willReturn($userFolder);
 
 		$share = $this->provider->getShareById($id);
 
@@ -1750,8 +1764,9 @@ public function testDeleteFromSelfUser(): void {
 		$file = $this->createMock(File::class);
 		$file->method('getId')->willReturn(1);
 
-		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getFirstNodeById')->with(1)->willReturn($file);
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getFirstNodeById')->with(1)->willReturn($file);
+		$this->rootFolder->method('getUserFolder')->with('user1')->willReturn($userFolder);
 
 		$share = $this->provider->getShareById($id);
 
@@ -1804,8 +1819,9 @@ public function testDeleteFromSelfUserNotRecipient(): void {
 		$file = $this->createMock(File::class);
 		$file->method('getId')->willReturn(1);
 
-		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getFirstNodeById')->with(1)->willReturn($file);
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getFirstNodeById')->with(1)->willReturn($file);
+		$this->rootFolder->method('getUserFolder')->with('user1')->willReturn($userFolder);
 
 		$share = $this->provider->getShareById($id);
 
@@ -1841,8 +1857,9 @@ public function testDeleteFromSelfLink(): void {
 		$file = $this->createMock(File::class);
 		$file->method('getId')->willReturn(1);
 
-		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getFirstNodeById')->with(1)->willReturn($file);
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getFirstNodeById')->with(1)->willReturn($file);
+		$this->rootFolder->method('getUserFolder')->with('user1')->willReturn($userFolder);
 
 		$share = $this->provider->getShareById($id);
 
@@ -1872,9 +1889,9 @@ function ($userId) use ($users) {
 		$file2 = $this->createMock(File::class);
 		$file2->method('getId')->willReturn(43);
 
-		$folder1 = $this->createMock(Folder::class);
+		$folder1 = $this->createMock(IUserFolder::class);
 		$folder1->method('getFirstNodeById')->with(42)->willReturn($file1);
-		$folder2 = $this->createMock(Folder::class);
+		$folder2 = $this->createMock(IUserFolder::class);
 		$folder2->method('getFirstNodeById')->with(43)->willReturn($file2);
 
 		$this->rootFolder->method('getUserFolder')->willReturnMap([
@@ -1929,9 +1946,9 @@ function ($userId) use ($users) {
 		$file2 = $this->createMock(File::class);
 		$file2->method('getId')->willReturn(43);
 
-		$folder1 = $this->createMock(Folder::class);
+		$folder1 = $this->createMock(IUserFolder::class);
 		$folder1->method('getFirstNodeById')->with(42)->willReturn($file1);
-		$folder2 = $this->createMock(Folder::class);
+		$folder2 = $this->createMock(IUserFolder::class);
 		$folder2->method('getFirstNodeById')->with(43)->willReturn($file2);
 
 		$this->rootFolder->method('getUserFolder')->willReturnMap([
@@ -1995,9 +2012,9 @@ function ($userId) use ($users) {
 		$file2 = $this->createMock(File::class);
 		$file2->method('getId')->willReturn(43);
 
-		$folder1 = $this->createMock(Folder::class);
+		$folder1 = $this->createMock(IUserFolder::class);
 		$folder1->method('getFirstNodeById')->with(42)->willReturn($file1);
-		$folder2 = $this->createMock(Folder::class);
+		$folder2 = $this->createMock(IUserFolder::class);
 		$folder2->method('getFirstNodeById')->with(43)->willReturn($file2);
 
 		$this->rootFolder->method('getUserFolder')->willReturnMap([
@@ -2066,9 +2083,9 @@ function ($groupId) use ($groups) {
 		$file2 = $this->createMock(File::class);
 		$file2->method('getId')->willReturn(43);
 
-		$folder1 = $this->createMock(Folder::class);
+		$folder1 = $this->createMock(IUserFolder::class);
 		$folder1->method('getFirstNodeById')->with(42)->willReturn($file1);
-		$folder2 = $this->createMock(Folder::class);
+		$folder2 = $this->createMock(IUserFolder::class);
 		$folder2->method('getFirstNodeById')->with(43)->willReturn($file2);
 
 		$this->rootFolder->method('getUserFolder')->willReturnMap([
@@ -2145,9 +2162,9 @@ function ($groupId) use ($groups) {
 		$file2 = $this->createMock(File::class);
 		$file2->method('getId')->willReturn(43);
 
-		$folder1 = $this->createMock(Folder::class);
+		$folder1 = $this->createMock(IUserFolder::class);
 		$folder1->method('getFirstNodeById')->with(42)->willReturn($file1);
-		$folder2 = $this->createMock(Folder::class);
+		$folder2 = $this->createMock(IUserFolder::class);
 		$folder2->method('getFirstNodeById')->with(43)->willReturn($file2);
 
 		$this->rootFolder->method('getUserFolder')->willReturnMap([
@@ -2223,8 +2240,9 @@ public function testMoveUserShare(): void {
 		$file = $this->createMock(File::class);
 		$file->method('getId')->willReturn(42);
 
-		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getFirstNodeById')->willReturn($file);
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getFirstNodeById')->with(42)->willReturn($file);
+		$this->rootFolder->method('getUserFolder')->with('user1')->willReturn($userFolder);
 
 		$share = $this->provider->getShareById($id, null);
 
@@ -2259,8 +2277,9 @@ public function testMoveGroupShare(): void {
 		$folder = $this->createMock(Folder::class);
 		$folder->method('getId')->willReturn(42);
 
-		$this->rootFolder->method('getUserFolder')->with('user1')->willReturnSelf();
-		$this->rootFolder->method('getFirstNodeById')->willReturn($folder);
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getFirstNodeById')->with(42)->willReturn($folder);
+		$this->rootFolder->method('getUserFolder')->with('user1')->willReturn($userFolder);
 
 		$share = $this->provider->getShareById($id, 'user0');
 
@@ -2943,23 +2962,23 @@ public function testGetAllShares(): void {
 		$id5 = $qb->getLastInsertId();
 
 		$ownerPath1 = $this->createMock(File::class);
-		$shareOwner1Folder = $this->createMock(Folder::class);
+		$shareOwner1Folder = $this->createMock(IUserFolder::class);
 		$shareOwner1Folder->method('getFirstNodeById')->willReturn($ownerPath1);
 
 		$ownerPath2 = $this->createMock(File::class);
-		$shareOwner2Folder = $this->createMock(Folder::class);
+		$shareOwner2Folder = $this->createMock(IUserFolder::class);
 		$shareOwner2Folder->method('getFirstNodeById')->willReturn($ownerPath2);
 
 		$ownerPath3 = $this->createMock(File::class);
-		$shareOwner3Folder = $this->createMock(Folder::class);
+		$shareOwner3Folder = $this->createMock(IUserFolder::class);
 		$shareOwner3Folder->method('getFirstNodeById')->willReturn($ownerPath3);
 
 		$ownerPath4 = $this->createMock(File::class);
-		$shareOwner4Folder = $this->createMock(Folder::class);
+		$shareOwner4Folder = $this->createMock(IUserFolder::class);
 		$shareOwner4Folder->method('getFirstNodeById')->willReturn($ownerPath4);
 
 		$ownerPath5 = $this->createMock(File::class);
-		$shareOwner5Folder = $this->createMock(Folder::class);
+		$shareOwner5Folder = $this->createMock(IUserFolder::class);
 		$shareOwner5Folder->method('getFirstNodeById')->willReturn($ownerPath5);
 
 		$this->rootFolder
diff --git a/tests/lib/Share20/ManagerTest.php b/tests/lib/Share20/ManagerTest.php
index 9e895a3020c17..05dad7d267a3c 100644
--- a/tests/lib/Share20/ManagerTest.php
+++ b/tests/lib/Share20/ManagerTest.php
@@ -26,6 +26,7 @@
 use OCP\Files\File;
 use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\Mount\IMountManager;
 use OCP\Files\Mount\IMountPoint;
 use OCP\Files\Mount\IShareOwnerlessMount;
@@ -497,7 +498,7 @@ public function testPromoteReshareFile(): void {
 		$manager->expects($this->exactly(1))->method('updateShare')->with($reShare)->willReturn($reShare);
 
 		$this->userManager->method('userExists')->willReturn(true);
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')->with('userA')->willReturn($userFolder);
 		$userFolder->method('getFirstNodeById')
 			->with(42)
@@ -588,7 +589,7 @@ public function testPromoteReshare(): void {
 			});
 
 		$this->userManager->method('userExists')->willReturn(true);
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')->with('userA')->willReturn($userFolder);
 		$userFolder->method('getFirstNodeById')
 			->willReturnCallback(function ($id) use ($subFolder, $otherFolder, $folder) {
@@ -650,7 +651,7 @@ public function testPromoteReshareWhenUserHasAnotherShare(): void {
 		$manager->expects($this->never())->method('updateShare');
 
 		$this->userManager->method('userExists')->willReturn(true);
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')->with('userA')->willReturn($userFolder);
 		$userFolder->method('getFirstNodeById')
 			->with(42)
@@ -732,7 +733,7 @@ public function testPromoteReshareOfUsersInGroupShare(): void {
 		$manager->method('getSharedWith')->willReturn([]);
 
 		$this->userManager->method('userExists')->willReturn(true);
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$this->rootFolder->method('getUserFolder')->with('userA')->willReturn($userFolder);
 		$userFolder->method('getFirstNodeById')
 			->with(42)
@@ -1178,7 +1179,7 @@ public function testGeneralChecks(array $shareParams, ?string $exceptionMessage,
 			['group0', true],
 		]);
 
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userFolder->expects($this->any())
 			->method('getId')
 			->willReturn(42);
@@ -1223,7 +1224,7 @@ public function testGeneralCheckShareRoot(): void {
 			['user1', true],
 		]);
 
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$userFolder->method('isSubNode')->with($userFolder)->willReturn(false);
 		$this->rootFolder->method('getUserFolder')->willReturn($userFolder);
 
@@ -3747,8 +3748,9 @@ public function testUpdateShareUser(): void {
 		Util::connectHook('OCP\Share', 'post_set_expiration_date', $hookListener, 'post');
 		$hookListener->expects($this->never())->method('post');
 
-		$this->rootFolder->method('getUserFolder')->with('newUser')->willReturnSelf();
-		$this->rootFolder->method('getRelativePath')->with('/newUser/files/myPath')->willReturn('/myPath');
+		$userFolder = $this->createMock(IUserFolder::class);
+		$userFolder->method('getRelativePath')->with('/newUser/files/myPath')->willReturn('/myPath');
+		$this->rootFolder->method('getUserFolder')->with('newUser')->willReturn($userFolder);
 
 		$hookListener2 = $this->createMock(DummyShareManagerListener::class);
 		Util::connectHook('OCP\Share', 'post_update_permissions', $hookListener2, 'post');
@@ -4873,7 +4875,7 @@ public function testGetAccessList(): void {
 		$node->method('getId')
 			->willReturn(42);
 
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$file = $this->createMock(File::class);
 		$folder = $this->createMock(Folder::class);
 
@@ -4972,7 +4974,7 @@ public function testGetAccessListWithCurrentAccess(): void {
 		$node->method('getId')
 			->willReturn(42);
 
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$file = $this->createMock(File::class);
 
 		$owner = $this->createMock(IUser::class);
diff --git a/tests/lib/TagsTest.php b/tests/lib/TagsTest.php
index 1827870ca6e21..5437c6ce9b8d2 100644
--- a/tests/lib/TagsTest.php
+++ b/tests/lib/TagsTest.php
@@ -11,8 +11,8 @@
 use OC\Tagging\TagMapper;
 use OC\TagManager;
 use OCP\EventDispatcher\IEventDispatcher;
-use OCP\Files\Folder;
 use OCP\Files\IRootFolder;
+use OCP\Files\IUserFolder;
 use OCP\Files\Node;
 use OCP\IDBConnection;
 use OCP\ITagManager;
@@ -55,7 +55,7 @@ protected function setUp(): void {
 			->expects($this->any())
 			->method('getUser')
 			->willReturn($this->user);
-		$userFolder = $this->createMock(Folder::class);
+		$userFolder = $this->createMock(IUserFolder::class);
 		$node = $this->createMock(Node::class);
 		$this->rootFolder = $this->createMock(IRootFolder::class);
 		$this->rootFolder
diff --git a/tests/lib/User/UserTest.php b/tests/lib/User/UserTest.php
index 750b99db4204e..d4e5b83e0c32a 100644
--- a/tests/lib/User/UserTest.php
+++ b/tests/lib/User/UserTest.php
@@ -16,6 +16,7 @@
 use OCP\Comments\ICommentsManager;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\Files\FileInfo;
+use OCP\Files\IRootFolder;
 use OCP\Files\Storage\IStorageFactory;
 use OCP\IConfig;
 use OCP\IURLGenerator;
@@ -659,8 +660,13 @@ public function testSetQuota(): void {
 				'23 TB'
 			);
 
+		/* Overwrite IRootFolder to avoid crash about unknown user */
+		$this->overwriteService(IRootFolder::class, $this->createMock(IRootFolder::class));
+
 		$user = new User('foo', $backend, $this->dispatcher, $emitter, $config);
 		$user->setQuota('23 TB');
+
+		$this->restoreService(IRootFolder::class);
 	}
 
 	public function testGetDefaultUnlimitedQuota(): void {
@@ -738,8 +744,13 @@ public function testSetQuotaAddressNoChange(): void {
 		$config->expects($this->never())
 			->method('setUserValue');
 
+		/* Overwrite IRootFolder to avoid crash about unknown user */
+		$this->overwriteService(IRootFolder::class, $this->createMock(IRootFolder::class));
+
 		$user = new User('foo', $backend, $this->dispatcher, $emitter, $config);
 		$user->setQuota('23 TB');
+
+		$this->restoreService(IRootFolder::class);
 	}
 
 	public function testGetLastLogin(): void {