Originally Posted by Korvmaistah
So I only do step 1 & 2 right?
Thank you for patience!
Don't you have data you want to recover from your old HDD, such as game saves?
If you don't, then you only need to do step 1.
Afterwards if you wish to downgrade to 3.55, you can using Rogero's downgrader, make sure to follow a proper tutorial though.
PS3 Slim CECH-3004A 160GB (500GB)
PS2 Slim SCPH-70004 - FMCB 1.8b