(adsbygoogle = window.adsbygoogle || []).push({}); Is there a way to have an HardDrive that has an Version of 3.50 so Then you could Downgrade?

no the firmware is stored on the NAND of the ps3, not the hardrive
so that means the if you put that HDD on a ps3 that is on 3.55, its going to ask you to update