Things You'll Need
Instructions
Go to the Xbox "Main Menu."
Scroll to "My Xbox," choose "System Settings," and then "Memory."
Select "Hard Drive" and hit the "Y" button on your controller. This will take you to the "Device Options" screen.
Select the "Rename" option, and use either a handheld Xbox 360 Messenger Kit keyboard, a USB keyboard plugged into your Xbox 360, or the on-screen keyboard, to enter a name that is less than 26 characters.
Select "Done" on the screen to save the new name.