I have a late-2012 Mac Mini. When I go to About This Mac > Storage, it tells me there's over 100GB of "Other": However there are only 4 folders on the root of Macintosh HD: Users (7.8GB) Applications (2.9GB) Library (3.7GB) System (8GB) There is nothing else on the Macintosh HD drive. But that's only 22GB approx. Any idea what's going on? Thank you.