hey all, i've got a tough one for you. background: i have a massive (150+ GB) music collection that I normally keep on my external drive. when i dragged and dropped this collection into itunes, i didn't realize that I had itunes set to "organize" my music files and move them to the itunes folder, which is on my main harddrive. well, what appears to have happened is that itunes moved MOST (but not ALL) of my music, from my drive, to the itunes folder on my computer. it then sorted them into artist/album folders, which are often split weirdly/annoyingly (say, a compilation album will be split into ten separate folders, one for each artist, or the album will only be copied halfway, leaving the other half on my drive). what is even MORE annoying is that itunes copied SOME files from my drive, and appears to have MOVED others from my drive. i've done a lot of comparing with finder and another finder-type program and there are definitely music files that were in my library on my drive, which are now ONLY on my computer in the itunes folder. because of this, i can't just move all of the music in the itunes folder on my computer back onto my drive. the folders are not organized how i want them AT ALL, and so many of them are duplicates that i would be adding 100 GB+ of duplicate music. (but not all of the files are duplicates! if they were, i would just delete the itunes music folder entirely). i would go through the files in the itunes music folder, but there are seriously at least a thousand subfolders; doing so is really out of the question. is there any way i can REVERSE what itunes did--that is, have some kind of program or process that moves files back to the drive that were moved and not copied, and deletes files that were simply copied? seriously, this might be a long shot but i've been working on this music library for about a decade, it's infuriating that it got messed up so badly so easily. i'm also a music TA and this is going to suck for finding stuff for class... any help is hugely appreciated.