Backup your Game Saves and edat/rif files to a pendrive, external HDD or FTP to PC.Can be useful to take 1 or 2 dumps of you flash after a successful upgrade.
On Boot, HEN Enabler icon is selected by default. Replaced devblind with devrewrite to maintain RW state at all times. Usually brick reports happen the first 24-48 Hours. Allow the community to conduct test as some CFW do not get proper testing and even ones that do some models can act differenly so its best to give it at least a 3 day wait. DO NOT RUSH to install a CFW / MFW Release.
If you do not own a HARDWARE FLASHER or have the means to recover from a possiable brick.Create a folder inside the PS4 folder named UPDATE. Now create a folder in the USB named PS4. Plug your USB stick into your PC with minimum space 512MB free space. You got a file to rename it to PS4UPDATE.PUP. UN-MOUNT actual game.This really important for example, cobra systems with webMAN, because webMAN mounts last played game on boot. PS4 Jailbreak 3.55 CFW installation process:-Download the PS4 Jailbreak 3.55 CFW.
GENERAL Tip's & Task to perform before a CFW Install:
