Here’s a clever method to replace the existing 20GB/60GB 2.5″ PS3 HDD with a 3.5″ SATA drive. As you may, or may not know, 3.5″ SATA drives are usually much larger (capacity-wise) and faster; not to mention cheaper.
If you’re like me, my 60GB PS3 does not have the storage capacity that I require. I am running Yellow Dog Linux and I’m going to need more room on the HD for installs and files that I want locally. That little 10GB partition the PS3 XMB is using is going quick; all those demos and videos that the Sony store is dumping is really beginning to add up. Not only that, what about my music and PS1 downloads for the PSP.
The PS3’s HDD bay only fits a 2.5″ drive — you need an external HDD case to accommodate the new 3.5″ disk. Something similar to the one you see below.

Modification requirements:
To see instructions (with photos) click the source link below. Nice job, Gudrun.
- source: PS3 SATA 3.5″ HDD Mod