I know I like to have multiple games on my system and not have to always delete or reinstall when I want to come back to it. If a game has good MP, I might keep multiple of those type of games on my drive as I get bored playing the same game all the time. I like to go from big games like RPG to your basic shooter, then your easy to jump in games which you can play for 10 15 mins with no big commitment. So as for storage goes, I usually only purchase a larger or extra storage when I get close to the max. I currently run a 4TB in my XoneX but then again it was very cheap when I bought it. I probably will do the same for either system I get when prices and deals are at their best.