Ok so normally I am pretty good with computers. Normally I can find most of the features on my own and things are good. This isn't one of those times. Why do i feel like i have no clue how much space anything takes up in OS X? How do I find out how much free hard drive space i have? And how do i figure out how much space the things I am throwing away take up? What happened to it telling you before it emptied the trash? Anyone know???