Instructions
Turn on your Xbox 360 console and a controller and navigate to the "My Xbox" and "System "Settings" menus.
Choose "Memory" from the System Settings menu and select "Games."
Scroll through the list of games until you reach the game you wish to edit the save for, and then select it.
Select an editing option for the game save. Choose "Copy" to copy it to another storage device, "Move" to move it to another storage device or "Delete" to delete the game save.