Hey i recently bought myself an xbox 360 because i used to play before. I have a question on USB flash drives. I just bought a 4gb xbox 360 slim i think thats what you call it, its the one with the kinect. Mainly for my sister, little cousins, etc. But i like playing games like Call of Duty too. My question is, if i get a USB flash drive, can i save on addons on it? Like Call of Duty mappacks and stuff? or do i need to upgrade by getting another harddrive?