If you've purchased another Xbox 360 console, you can transfer all your data over with the Xbox 360 Hard Drive Transfer Cable from Microsoft. Games, videos, music, game saves, gamertags, and even your achievements can be transferred over with this cable. This cable is compatible with the Xbox 360 and the Xbox 360 S models.
Transfer games, videos, music, game saves, gamertags, and achievements to another Xbox 360 or Xbox 360 S console