im planning to transfer about 100 gigs of files to a hard drive that my friend is going to let me borrow. (So i can format my hard drive, re-install windows xp and vista, then transfer files back). about 30 gigs are MP3 and I transferred them from an older hard drive i had a while back. is it possible files can get worse or become corrupt if they are transferred from hard drive to hard drive a lot? the hard drive im going to borrow is the same hard drive as mine.