Normally, I actually would get a 1 GB Memory Stick. But considering how Monster Hunter Freedom Unite will take up more than half of that, I find it easier to get a 4 GB Memory Stick now. If your asking about how one game can take up so much space, let me explain. From what I hear, there's a feature in the game which can copy all the files in the disc to the Memory Stick, taking up around 500 something MB. The process takes about 14 minutes to do. The reason for wanting to do this is that load times get reduced DRAMATICALLY!! From around 27 seconds for load times, to a mere 2-3 seconds for load times! A since I'm also need space for save files for games and for the Spyro the Dragon download I also intend to get, I'll need way more than 1 GB to fit everything. So that's why I plan to atleast get a 4 GB Memory Stick, and I'll most likely end up saving up extra Christmas money and my Birthday money for a 16 GB memory stick.