Things You'll Need
Instructions
Turn on your PS3 and television.
Insert a USB storage device. The PS3 is compatible with most USB thumb drives and hard drives.
Press the left joystick or directional pad toward the right. Continue moving across main menu until you find the ̶0;Game̶1; selection.
Move the joystick or directional pad downward until you find the ̶0;Saved Data Utility̶1; option; then press ̶0;X.̶1;
Navigate through the ̶0;Saved Data Utility̶1; folder using the joystick until you find ̶0;Call of Duty: World at War.̶1;
Press the triangle button to view additional options of ̶0;Call of Duty: World at War.̶1;
Highlight the ̶0;Copy̶1; option, and then press the "X" button.
Select the USB device using your joystick; then hit ̶0;X̶1; again. The saved data is backed up to your thumb drive.