I last used my computer at 10:30 pm last night, and was at 116 GB hard drive capacity. All of a sudden, I'm at 80 GB! How did all this space suddenly disappear? I haven't downloaded anything huge, and neither has my brother, who also uses the imac. I know for sure I had 116 GB, and that I haven't used even 30 GB... I have the same stuff almost mirrored on an ibook with a 60 GB drive, and I still have 37 GB left on that computer.