Playstation 3 4.66 CFW from stock 4.31 on Phat PS3 40GB - Do I need to be on 3.55 or higher than 4X

Hi guys,
Basically just got a 40gb ps3 phat for cheap and I used to have a rogero build phat years ago, haven't been in the scene for awhile and no matter what cfw I try for 4.66 on different formatted fat32 memory sticks I get a corrupt data error
Do I need to be on a higher firmware or a lower 3.55 cfw to do this?
My console is a CECHG04-3-279-630-01 any info would be greatly appreciated!

 

Not sure if this is acceptable to talk about here. I know your OcUK thread was deleted.

But if you were still looking for help elsewhere perhaps it would be a good idea to mention your current firmware version.

 

Let's err on the side of caution and not have the discussion on Bit. There are plenty of less respectable forums on the internet where you'll find your answers