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You cannot perform a firmware revert using just a USB drive. You will need:
By modifying the CoreOS flags in the NOR dump and writing it back to the console, you force the PS4 to boot from the inactive "old" slot. ⚠️
for public use as of April 2026. Official PlayStation 4 firmware downgrading is strictly restricted by Sony's security measures. ftp.bills.com.au Status of PS4 Downgrading There is currently no simple "one-click" app ps4 tool downgrade v100 new
Historically, when Sony released a mandatory firmware update, reverting to a previous software version (like restoring a factory default state) was widely considered impossible without dedicated hardware flashers (like the Teensy++). The console strictly enforces an anti-downgrade mechanism.
: NOR is always written first, followed by Syscon. If you write a NOR dump, you must also write to Syscon. Failing to do so will brick your console. Furthermore, you need matching dumps in terms of firmware version and backup timing. You cannot perform a firmware revert using just a USB drive
to its , but there is no software-only "magic button" to do so. This process is technically known as a Revert .
How to Revert the PS4 to a Previous Firmware (Full Tutorial) : NOR is always written first, followed by Syscon
: These procedures carry a high risk of permanently "bricking" (breaking) your console. Legitimate Related Tools
: A fine-tip iron, flux, and thin wire (30 AWG) to connect to the Syscon and NOR chips.
Note: Downgrade may wipe internal storage; verify backups before continuing.