Instructions
Insert a USB flash drive into one of the PS3's two USB ports.
Power on your PS3 console. If your flash drive has a flashing activity light, it should be flashing, which means it is receiving power from the PS3.
Scroll through the "Photo," "Music," "Video," or "Game" icons and select the type of data you want to transfer to the flash drive.
Find the data you want to transfer and press the "Triangle" button on your PS3 controller. Select the "Copy" option and choose "USB Device" as your save destination.