By Tugpsx on Dec 26, 2016: #1 Had a bit of an issue where my son accidentally updated PS3 to 3.56 in order to play a game. He realized the error and tried to fix it using info found on YouTube for hard drive fix. This then rendered the drive not to boot. When system loads it wants to fix then ask to format the hard drive. I replaced the hard drive with a 500GB and it boots but the system is now on 3.56. So the questions are: 1) How can I get back to CFW 3.55? 2) Is there any way to get access to the 750GB HDD? I have see something about getting a drive access key file, but I guess its catch 22.