You will need tools like a Raspberry Pi, jumper wires, and soldering equipment. How to Downgrade: The General Process (Hard Downgrade)
The internet features numerous YouTube videos and websites claiming to offer a simple USB software tool that downgrades any PS4 with the click of a button. : These are scams. ps4 downgrade 10.50 to 9.00
A Raspberry Pi (Pi Pico or Pi 4) or a specialized NOR flasher (e.g., Teensy++). Soldering iron and wire. A clean, verified 9.00 PS4 Update File ( PS4UPDATE.PUP ). You will need tools like a Raspberry Pi,
Sony designed the PlayStation 4 motherboard architecture to prevent malicious modifications and software rollbacks. Two dedicated hardware chips control this mechanism: A Raspberry Pi (Pi Pico or Pi 4)
: The PS4 saves data in two "slots" (Slot A and Slot B). One holds the active firmware (10.50), and the other holds the previous one. If you updated from 10.01 to 10.50, you can only revert to 10.01. If you have updated multiple times since 9.00, version 9.00 is likely overwritten and unrecoverable Software Scam Warning
. It cannot be done through a simple USB software update or by formatting the hard drive, as the console's motherboard (the Syscon and NOR chips) stores the current and previous firmware versions to prevent unauthorized rollbacks. The Reality of PS4 Downgrading Hardware Requirement