A variety of things; taking inventory now, the biggest chunks include: 80GB - Boot Camp partition I almost never use but is too useful to get rid of 48GB - /u

A variety of things; taking inventory now, the biggest chunks include: 80GB - Boot Camp partition I almost never use but is too useful to get rid of 48GB - /usr/src (hmm, I can probably cut this down, but it includes >700 source trees and I don't remember which of them I care about); biggest individual offenders are: -> 2.5GB - linux source tree -> 15GB - chromium source tree 25GB - /Applications 20GB - ~/Music 20GB - anime 20GB - Windows VM (XP!) 9GB - /usr/local, mostly Homebrew 8GB - ~/Pictures, and that's with the Photos app's option to only store thumbnails and stick the rest in iCloud. (Though the preference says: "Originals will also be stored on this Mac if you have enough storage space." Annoying that this isn't more customizable.)