: The PS4's hardware and software are designed to only accept firmware updates that are equal to or newer than the currently installed version. Hardware Reversion
If the file was corrupt, or if the flash memory on the motherboard was wearing out, the console would "brick." It would become an expensive paperweight. A doorstop that sounded like a jet engine. ps4 downgrade 13.02 to 9.00
You can only revert to the firmware version that was installed immediately before your last update. The Result: : The PS4's hardware and software are designed
Sony designed the PlayStation 4 with a "locked" firmware system. You cannot simply install an older version from a USB drive or reset the console to an earlier firmware via Safe Mode. If your console is already on 13.02, it has "blown fuses" (figuratively) that prevent older software from running. The Only Method: Hardware Reversion (Syscon Revert) You can only revert to the firmware version