The Access Controlled Link copy of a students submitted Assignment is placed within a (mostly) understandable directory tree structure on the host master Moodle Google Drive, having the form:

• /System
  • /Category (Name id=x)
    • /Course (Name id=y)
      • /Assignment (Name id=z)
        • /submission_files
          • /some integer (e.g. 14)

The rationale behind the final integer is not clearly documented but there is only one of them so aside from being apparently arbitrary, poses no significant impediment to navigation. 

However, the student submission filenames placed within the terminal directory are directly copied from the originals, that is, whatever the student named them. This can mean multiple identically named files and since Moodle, not the student, is the owner there is no way to easily identify the author of each unless the student troubles themselves to include their name somewhere in the body text of the submission.

What is needed is for Moodle to prepend the submitting student's username to the filename of the Access Controlled Link copy.