diff --git a/plex-media-converter/main.py b/plex-media-converter/main.py
index 24e0f19..b552519 100644
--- a/plex-media-converter/main.py
+++ b/plex-media-converter/main.py
@@ -1,14 +1,24 @@
 import typer
 from rich import print
+from utils.directory import is_mounted_directory
 
 app = typer.Typer()
 
 @app.command()
 def scan(directory: str):
+    """
+    Scan a path for mkv files. Used to test the directory before running a conversion job.
+    """
     print("Scanning directory:", directory)
 
+    if is_mounted_directory(directory):
+        print("Directory is detected as mounted. To improve file I/O performance, when performing conversions the mkv file will be copied locally during video encoding.")
+
 @app.command()
 def convert(directory: str):
+    """
+    Convert all mkv files in a directory to mp4 and split subtitles.
+    """
     pass
 
 if __name__ == "__main__":
diff --git a/plex-media-converter/utils/directory.py b/plex-media-converter/utils/directory.py
new file mode 100644
index 0000000..2f94c52
--- /dev/null
+++ b/plex-media-converter/utils/directory.py
@@ -0,0 +1,8 @@
+
+import os
+
+def is_mounted_directory(path: str) -> bool:
+    """
+    Check if a directory is a mounted directory.
+    """
+    return os.path.ismount(path)