I recently bought a 12 GB ps3 slim !! After i played Fifa 12 and WWE 13 and Assassins creed 3 i inserted a GTA 4 disk and then it showed me that i need more space. I cannnot afford a new hard drive cause i already saved a lot for this. But i have a hard disk that i changed into FAT 32 and i tried it. I just wanted to know how to transfer my Game data Utility to it. Pls i really need help!!
You will need another USB flash drive and use the Backup Utility. Then you restore that backup on your newly installed hard drive.
In other words you need two sources of memory to do the transfer (unless the 12G model is somehow different)