You cannot do this with just a USB drive. You need soldering skills and hardware tools.

This article provides a deep dive into the reality of PS4 downgrading, the specific tools involved, the step-by-step hardware procedure, and the considerable risks you must understand.

Can you downgrade your PlayStation 4 firmware? If you updated your console and lost access to homebrew, Linux, or custom modifications, you are likely searching for a "PS4 downgrade tool."

A tiny microcontroller, often called a Tiny Jumper Cable (TNC), is soldered to the motherboard to interact with the syscon chip. How to Revert PS4 Firmware (The "Downgrade" Method)

Essential for connecting wires to microscopic motherboard points.

By accessing and patching the console's internal NOR and Syscon chips, tech-savvy users can force the console to switch back to the inactive slot.

: You can typically only revert to the firmware version that was installed immediately before your current one (e.g., from 11.50 back to 11.00). Hardware Dependency

Use the flasher to write the modified data back to the NOR and Syscon.

Go to Settings -> System -> System Information.

, and only to the version installed directly before the current update. Final Verdict

The PS4 motherboard maintains two firmware slots: Slot A (Active) and Slot B (Inactive/Previous) .

If you tell me, I can help you find the latest, safest exploit guide for that version. Share public link

A single mistake in patching the NOR/Syscon can result in a console that will never turn on again.