I keep getting a pop up saying my start up disk is almost full, or that my iTunes library couldn't be saved, but I've still got a quarter of hard drive available on my new iMac. OmniDiskSweeper shows that most of the memory goes to my iTunes Media and Pictures/videos, but that shows just 61GB of hard drive used for Users.
What could be using my hard drive space that doesn't show in OmniDiskSweeper?
What could be using my hard drive space that doesn't show in OmniDiskSweeper?