diff --git a/S3MP/_version.py b/S3MP/_version.py
index 1ee95cb..363c446 100644
--- a/S3MP/_version.py
+++ b/S3MP/_version.py
@@ -1,3 +1,3 @@
 """Semantic versioning for S3MP."""
 
-__version__ = "0.5.3"
+__version__ = "0.6.0"
diff --git a/S3MP/mirror_path.py b/S3MP/mirror_path.py
index 9ebad63..04fe8f9 100644
--- a/S3MP/mirror_path.py
+++ b/S3MP/mirror_path.py
@@ -37,7 +37,11 @@ def s3_key(self) -> str:
         """Get s3 key."""
         ret_key = "/".join([str(s.name) for s in self.key_segments])
         # We'll infer folder/file based on extension
-        return ret_key if '.' in self.key_segments[-1].name else f"{ret_key}/"
+        # HACK to catch case where the "extension" is actually a part of the folder name
+        # (eg, a folder named "v0.1.0"), we check if the extension is actually a number
+        name = self.key_segments[-1].name
+        ext = name.split('.')[-1]
+        return ret_key if (ext is not name and not ext.isdigit()) else f"{ret_key}/"
     
     @property
     def local_path(self) -> Path:
@@ -86,6 +90,10 @@ def is_file_on_s3(self) -> bool:
         """Check if is a file on s3."""
         return key_is_file_on_s3(self.s3_key)
     
+    def is_file_and_exists_on_s3(self) -> bool:
+        """Check if is a file and exists on s3."""
+        return self.exists_on_s3() and self.is_file_on_s3()
+    
     def update_callback_on_skipped_transfer(self):
         """Update the current global callback if the transfer gets skipped."""
         if S3MPConfig.callback and self in S3MPConfig.callback._transfer_objs:
@@ -151,28 +159,7 @@ def get_child(self, child_name: str) -> MirrorPath:
 
     def get_children_on_s3(self) -> List[MirrorPath]:
         """Get all children on s3."""
-        child_s3_keys = []
-        continuation_token = None
-
-        while True:
-            resp = s3_list_child_keys(
-                self.s3_key, continuation_token=continuation_token
-            )
-
-            # Collect keys from the current response
-            if "Contents" in resp:
-                child_s3_keys.extend(
-                    obj["Key"] for obj in resp["Contents"] if obj["Key"] != self.s3_key
-                )
-            if "CommonPrefixes" in resp:
-                child_s3_keys.extend(obj["Prefix"] for obj in resp["CommonPrefixes"])
-
-            # Check if there are more pages to fetch
-            if "NextContinuationToken" in resp:
-                continuation_token = resp["NextContinuationToken"]
-            else:
-                break
-        return [MirrorPath.from_s3_key(key) for key in child_s3_keys]
+        return [MirrorPath.from_s3_key(key) for key in s3_list_child_keys(self.s3_key)]
 
     def get_parent(self) -> MirrorPath:
         """Get the parent of this file."""
diff --git a/S3MP/utils/s3_utils.py b/S3MP/utils/s3_utils.py
index 11759fa..e89933a 100644
--- a/S3MP/utils/s3_utils.py
+++ b/S3MP/utils/s3_utils.py
@@ -3,8 +3,7 @@
 from pathlib import Path
 from S3MP.global_config import S3MPConfig
 from S3MP.types import S3Bucket, S3Client, S3ListObjectV2Output
-from botocore.exceptions import ClientError
-
+from typing import List
 
 def s3_list_single_key(
     key: str,
@@ -20,10 +19,9 @@ def s3_list_single_key(
 
 def s3_list_child_keys(
     key: str,
-    bucket=None,
-    client=None,
-    continuation_token=None,
-):
+    bucket: S3Bucket = None,
+    client: S3Client = None,
+) -> List[str]:
     """List details of all child keys on S3."""
     if not key.endswith("/"):
         warnings.warn(f"Listing child keys of {key} - key does not end with '/'")
@@ -34,9 +32,29 @@ def s3_list_child_keys(
         "Prefix": key,
         "Delimiter": "/",
     }
-    if continuation_token:
-        params["ContinuationToken"] = continuation_token
-    return client.list_objects_v2(**params)
+    child_s3_keys: List[str] = []
+    continuation_token: str = None
+    while True:
+        if continuation_token:
+            params["ContinuationToken"] = continuation_token
+
+        resp = client.list_objects_v2(**params)
+
+        # Collect keys from the current response
+        if "Contents" in resp:
+            child_s3_keys.extend(
+                obj["Key"] for obj in resp["Contents"] if obj["Key"] != key
+            )
+        if "CommonPrefixes" in resp:
+            child_s3_keys.extend(obj["Prefix"] for obj in resp["CommonPrefixes"])
+
+        # Check if there are more pages to fetch
+        if "NextContinuationToken" in resp:
+            continuation_token = resp["NextContinuationToken"]
+        else:
+            break
+
+    return child_s3_keys
 
 def download_key(
     key: str,
@@ -47,12 +65,18 @@ def download_key(
     """Download a key from S3."""
     bucket = bucket or S3MPConfig.bucket
     client = client or S3MPConfig.s3_client
+
+    if not key_exists_on_s3(key, bucket, client):
+        raise ValueError(f"Key {key} does not exist on S3")
+    
+    # If the key is a file, download it
+    # Otherwise, download all child keys
     if key_is_file_on_s3(key, bucket, client):
         local_path.parent.mkdir(parents=True, exist_ok=True)
         client.download_file(bucket.name, key, str(local_path), Callback=S3MPConfig.callback, Config=S3MPConfig.transfer_config)
     else:
-        for obj in s3_list_child_keys(key, bucket, client)["Contents"]:
-            download_key(obj["Key"], local_path / obj["Key"].replace(key, ""))
+        for child_key in s3_list_child_keys(key, bucket, client):
+            download_key(child_key, local_path / child_key.replace(key, ""))
     
 def upload_to_key(
     key: str,
@@ -86,20 +110,19 @@ def key_is_file_on_s3(
     bucket: S3Bucket = None,
     client: S3Client = None,
 ) -> bool:
-    """Check if a key is a file on S3, returns false if it is a folder. Raises an error if the key does not exist."""
+    """Check if a key is a file on S3 by using head_object."""
     bucket = bucket or S3MPConfig.bucket
     client = client or S3MPConfig.s3_client
-    if not key_exists_on_s3(key, bucket, client):
-        raise ValueError(f"Key {key} does not exist on S3")
-    res = s3_list_single_key(key, bucket, client)
-    # Handle case of trailing slash, but still verify
-    if (
-        key[-1] == "/"
-        and len(res['Contents']) == 1
-        and res['Contents'][0]['Key'] == key
-    ):  
-        return False
-    return "Contents" in res
+
+    try:
+        client.head_object(Bucket=bucket.name, Key=key)
+        return True
+    except Exception as e:
+        # 404 occurs if the key is a "folder" or does not exist
+        if "404" in str(e):
+            return False
+        else:
+            raise e
 
 
 def key_size_on_s3(
@@ -124,8 +147,8 @@ def delete_child_keys_on_s3(
     """Delete all keys that are children of a key on S3."""
     bucket = bucket or S3MPConfig.bucket
     client = client or S3MPConfig.s3_client
-    for obj in s3_list_child_keys(key, bucket, client)["Contents"]:
-        client.delete_object(Bucket=bucket.name, Key=obj["Key"])
+    for child_key in s3_list_child_keys(key, bucket, client):
+        client.delete_object(Bucket=bucket.name, Key=child_key)
 
 
 def delete_key_on_s3(
diff --git a/pyproject.toml b/pyproject.toml
index 63a40ed..2e4cd9d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "S3MP"
-version = "0.5.3"
+version = "0.6.0"
 description = ""
 authors = [
     {name = "Joshua Dean", email = "joshua.dean@sentera.com"}