Potentially high
from firmware 13.02 to 9.00 via software is completely impossible. Sony’s security architecture physically prevents rolling back the operating system using a simple USB flash drive or standard system settings. Any website, software package, or online tool claiming to offer a "one-click software downgrade" or a "13.02 jailbreak installer" is a malicious scam targeting unsuspecting users.
: Some entry points, such as the PS Vue exploit or BD-JB (Blu-ray exploit), may work for limited code execution, but they do not allow for game backups or full system control. ps4 downgrade 13.02 to 9.00
Firmware is tied to the console's internal flash memory (NOR/NAND), not the hard drive. Replacing the HDD will not change the system version.
There is a documented process called that allows you to return to the immediate previous firmware version. However, this process requires: Potentially high from firmware 13
: Locate the Serial Flash Memory (NOR) chip and the Syscon chip.
The PS4 has two firmware "slots" (Current and Previous). If you just updated to a firmware higher than 9.00 and haven't updated again since, your 9.00 data might still reside in the secondary slot. : Some entry points, such as the PS
: A reliable flashing tool like a Teensy 2.0++ or a Raspberry Pi Pico configured for SPI flashing.
Downgrading a PS4 from a newer firmware (like 13.02) to an older one (9.00) is highly restrictive and generally . While the community often seeks version 9.00 for its highly stable jailbreak, Sony's security prevents users from simply installing older firmware via USB. The Reality of PS4 Downgrading
: Mismanaging the NOR flash data or bridging solder joints on the motherboard can permanently corrupt the console’s security keys. If these keys are lost, the console becomes an unrepairable "brick."