As this is under "Hardware", connect&mount the disc to another machine and look in detail (after making a byte-copy, preferably with linux tools)
then maybe you can tell us...

>This VFP app has been running since 2001.
>It runs on a Win server and is accessed remotely by a single user.
>The base folder is Q:\pro6
>Yesterday, an entire folder that holds most of the programs in the app- Q:\pro6\ac\- just disappeared.
>The user can't access the folder.
>What's up?