Thanks for the info.
1. If I turn off my switch in Custom Firmware or the battery depleted, I have to make sure to turn it back on with RCM mode right?
2. If happen to press power button to turn on without entering RCM, this means the nand backup is wasted since it already power on to original...
On step 21 of Backup, it says to backup "eMMC SYS and eMMC User" but on step 7-9 of Restore, it only says to restore eMMC boot0/1 and eMMC RAW GPP.
Why do we need to back up SYS/User files if we are not restoring GPP partitions or do we need to restore GPP partitions too?
Not sure about other models of Pi4 but the Pi 4 B with 8GBs OCed to 2Ghz handles PSP really great except like 1 game I found and it is playable it just looks bad lol Motor Storm Arctic something or other.