ExtremeTech: "Back in September, the fine folks at DL.TV showed you how to replace the PS3's hard drive with a bigger one. It's easy-if you have a 2.5-inch form factor SATA hard drive, it's just a matter of turning a few small screws and sliding it in there. The hardest part is making sure your large disk is formatted with FAT32 first, which can be a challenge in Windows (there are lots of freeware apps that will format large FAT32 partitions on Windows, though).
But changing out your PS3 hard disk for another bit of rotating magnetic storage is kids stuff. We've already raved about the stellar performance of Intel's new X-25 solid-state drive, which just happens to come in an 80GB capacity and 2.5-inch SATA form factor. Perfect for a PS3!"