Originally posted by primetime43
I guess you can, but this way is recommended, and if you want to downgrade back down, you need to make sure QA is enabled.
Question,
I'm getting an old ps3 that is on a 2.x firmware but has a broken disk drive
Would I be able to upgrade straight to 4.21 REX?
You say that I wouldn't be able to downgrade but isn't it possible to downgrade to the 3.55.3 firmware and from there go to 3.55 OFW and do whatever from there?
Also if I wanted to play backups how will I do so? I have the disks for games but with a broken disc drive how will I back them up?