What is most likely is that the flolder containing your files has inadvertantly been moved inside another folder...
IF they've actually been deleted It's POSSIBLE the files are still in your "recycle bin"
and defragging will wipe them out.
Recuva might being them back,But only if they were actually deleted. but failing that look for a copy of an old DOS program called ZTree
(it will run in WinXP)And look for the files by file spec.
I would presume they are either mp3, wav, or other common audio codec?
Ztree is capable of so much more than WindowsExplorer as it lets you look and move files selectively.
One of my favorites is Logging the full drive "L" F2 F2 x(Drive letter)
that opens ALL directories, then "F" (File Spec) For example "*.mp3"
Then "S" for "show all"
At that point you can "T" for "tag" the files and copy them to another drive.
Control-C copies them all to a single location.
Alt-C copies them to another specified location AND recreates the path.
the one thing Z-tree CANNOT DO is relocate folders IN the tree structure
without a lot of difficulty, Windows explorer does this very easily
(which I submit is how you got into the mess you are in now)
with Explorer you can easily "drag" folders to somewhere you didn't intend to move them.
If the drive still shows as holding the data it's probably still there...