I've messed up: I reformatted a new SSD for my PS3, but after that, when I try to swap to the original drive to get the backup data, it won't boot and asks me to reformat the whole drive. The older drive is in version 4.88 and the SSD in 4.90.
So I have two questions:
How can I get the PS3 to read the older drive again?
If I update the older drive via USB to 4.90, will it erase all my data?