Things You'll Need
Instructions
Slide the flash drive into one of the 360's USB drives along the front of the system.
Select "My Xbox," then "System Settings," then "Memory," then "Storage Device."
Press "Configure Now" if you want to format the entire drive. This will delete everything on the drive.
Press "Customize" if you want to format only a section of the drive's space. Move the bar to the desired memory you want to allocate and select "Configure" to begin the process.