Emulation is great, anything from Atari-N64 (Heck the entire library of games) shouldn't take up more than maybe 60 gb. I know for sure that the entire N64 library is 8gb, but once you get into GC, PS1,2 and up it gets a lot larger from there. I myself use both emulators and consoles depending on the games, that being said emulators are not 100% perfect and do have their fair share of glitches., especially N64, GameCube, and Wii emulation (From my experience) but nothing making the games unplayable (Except for onker's Bad Fur Day, their is a crash in post Project 64 1.6 updates that causes the game to crash) it's mostly just music not playing, slight graphical errors or just the controls feeling weird because of the Xbox 360 controller.