Xbox 360 Memory Unit (64 MB) Further enhancing the gaming experience, Xbox 360 Memory Units allow you to save your in-game achievements and unique gamer profiles. The Memory Units are easily portable and enable quick and easy access to previously established benchmarks, putting you in control of your games and your lifestyle. You can save your games, your Xbox Live profile, and more with Xbox 360 Memory Units. * Transport your Memory Unit in the portable carrying case that fits on your keychain. * The Memory Unit (64 MB) requires no setup. Just plug it in, and you can save your favorite games. * Xbox 360 holds up to two Memory Units, so you can easily upgrade to more storage space.