How to copy PS3 save game data to external or USB drive

You put the usb storage device in the PS3, 

• go to the Saved Data Utility option in the Game area of the Xross Media Bar (the interface of the PS3). Press Triangle once at the game save you want to copy and select "copy". 
• You then select where to copy the game save - the portable device should show up there. Press X and it will copy it for you.

You're done