I have some random 3.55 CFW (I dont remember wich one, it is such a long time ago since I installed it), and Im about to upgrade it to 4.30 rogero.
I am following a guide, and I know I can do it. But I still have 2 questions:
1. How do I check that my NAND/NOR dump is a valid backup?
2. Can I upgrade 3.55 CFW -> 4.30 Rogero, or should I first install 3.55 OFW?
I have a fat 40GB PS3 with a serial that ends with CECHG04.