Things You'll Need
Instructions
Turn on your PS3, then insert a USB mass storage device, CompactFlash, SD card or memory stick.
Navigate to "Game" and the "Saved Data Utility" screen. Select the correct game save and press the "Triangle" button.
Select "Copy" from the sidebar, then press the "X" button on your inserted backup device to begin the copy process. A green progress bar indicates how long the process will take.
Navigate to "Settings," select "System Settings," then advance to the "Format Utility" screen. Press the "X" button on the "Format Hard Disk" option. Select "Yes" when the warning screen indicates, "If you format, all data on the hard disk will be deleted. This data cannot be restored. Are you sure you want to continue?" Your PS3 begins the format process.