You can expand your storage space. The stick must be formatted to the xbox file system and can be then only used on the xbox, also the maximum possible size is 32GB. To format the usb stick: 1  Plug in stick. 2  Press th Guide button and go to Settings tab and select System settings. 3  Select storage. 4  Select USB storage. 5  Click configure now. 6  Move the reserved storage slider you your wanted level, preferably use the wholestick. 7  All done, you can now save your GTA to the stick.