Get a usb thumb drive and plug it in. Then go to the saved data you want to copy and hit triangle to copy. If u have a PS3 model that has a memory card reader then you can also use any of the card formats that it supports. After you copy the data plug the drive/card into the computer and copy it into a folder. If you ever want to transfer it back to your PS3, then copy the data the computer onto the drive/card and plug it into the PS3. Go to it under the game section on the XMB then click copy.