My iMac is no longer reading my external hard drive, but when I plug it into my roommate's pc, it works fine. (on the pc, it does not appear on the desktop, but appears in 'my computer.' on the mac, it does not appear on the desktop as it used to do, now it just appears in Disk Utility). I need the contents of the hard drive because I don't have them anywhere else! So erasing is not an option. Is there anyway to save the files? Or do I have to dump all the files on a PC, and restore the hard drive? Thanks for any help!