Things You'll Need
Instructions
Turn the Xbox 360 on with the USB drive inserted. Insert the USB drive in the back of the console above the Ethernet cable connection.
Allow the dashboard to load on the console. Navigate to the "My Xbox" section by scrolling up or down on the dashboard.
Locate "System Settings." Select the "Memory" option from the list. Select "All Devices" from the new list of sections that appear.
Select the USB storage device. Select "Configure Now" and allow the console to format the drive. Follow the on-screen prompts that appear.
Select "All Devices" from the "Memory" option located under the "System Settings." Select "Gamer Profiles" from the list of options. Locate your "Gamer Profile" that you wish to move to the USB drive.
Select the "Move" option and then choose the USB storage device. Allow the gamer profile to transfer and then remove the USB drive from the console.