I know I'm not a regular here, but I figured I'd have some fun with Radium in this instance. If this is generally frowned upon, please ignore. I just can't resist a DOS console, though.

dir /S /W

I'm not sure if DOS displays hidden files on default. Someone help me out there. In which case,

dir /AHS /S

Also, check if the device has any other drives using

D:

qbasic gorilla.bas