Instructions
Enter the Xbox 360 dashboard and go to "My Xbox." Select "System Settings" and press "A" to confirm.
Choose "Memory" from the list of system settings and devices and press "A." This will open a screen that shows available storage devices, such as a hard drive or memory unit. Select the device that contains the file you wish to copy.
Pick a file category from the list. These can include games, profiles, videos, themes and gamer pictures. Press "A" to open the category.
Scroll down the list to find the file you wish to copy. Press "A" to select it, then pick the option to "Copy" on the next screen. This will open up the storage device screen again.
Select the device you wish to copy the file to and press "A."