I have a PS3 slim, the 250gb edition. The remaining space after PS3 creates a swap file and a couple of games left almost no space. I decided to swap my laptop's 500gb HDD with the PS3's 250gb hdd, since my laptop never have been near to be half filled. All the data I have are in my main PC or a handful of external drives . From what I am collecting from here and there it will install OFW 3.55 so after that I will have to look how to jailbreak it, but I am worried because my PS3 was OFW 3.60 and I had to give it to a local shop to downgrade it and they also installed the CFW and mmCM, so I am not sure what will happen. Some info on the PS3: Version 4.53 [SC-35 | PL3] Firmware Mode: Cobra 7.00 Model: CECH-2004B Be it you have a reply or not, I hope you all are having a great week -Edit- Considering how there are a couple of CFWs and even different versions of it and since I did not know what my PS3 had, I decided to just downgrade to 3.55 OFW and then backup everything and move to a new HDD. At least now I will know what I will have installed.