Backup of current Firmware and Upgrade to Official Firmware
I'm currently running REBUG 4.30.1 on my jailbroken PS3, however I want to wipe my current system and upgrade the firmware to the latest official version in preparation for GTA:V(want to be able to play online without the possibility of getting banned).
My First Question is: Can I backup my entire system and restore it at some point in the future?
Second Question: What is the best way to wipe the system?
Third Question: Would it possible to downgrade if the first one isn't possible?
Thanks for any Help.