Considerations when using "mkdir"
If using "mkdir" with FileStore (NS3), the following considerations apply.
A subdirectory and file in the same directory cannot have the same name.
This applies regardless of the file type or extension. A single directory cannot contain a subdirectory named “baseball” as well as a file entitled “baseball.mp4”. When creating a new directory, ensure that the name used does not already apply to a file that exists in the same location.