The other way known way is FTP (only Jailbreak PS3).
1.0.1 Installation:-Unzip the archive on your USB drive and copy the file respecting the structure PS3/SAVEDATA/XXXXXXXXXXXXXX.-insert the USB device into your PS3.-Go to the Savegame manager from the XMB and you’ll have your save.-Caution: If the words “corrupt data” appears is that the USB transfer mode is not good.1 Call of Duty World at War PS3 Savegame.