You can upgrade the hard disk drive on PS3 systems with model numbers CECH-4000A and CECH-4000B which correspond to the 12GB and 500GB PS3 systems. To do this, all you need is an Sabrent BK-HDPS mounting bracket and an additional 2.5 hard disk drive.
* This Hard Disk Drive Mounting Bracket is compatible for PS3 system CECH-400X Series
* This is for the newest PS3 console, which has been nicknamed "Super Slim" ,If you have purchased the PS3 Super Slim 12gb model and wish to fit a hard drive. This is what you need (and of course a 2.5" SATA hard drive as well).