Because the author cannot directly link to external executable files that may violate copyright or security guidelines,
If you're determined to explore PS4 modifications, follow these safety protocols: ps4 tool downgrade v100 exe link download
You cannot downgrade a PS4 from a high firmware (e.g., 11.00 or 12.00) down to a jailbreakable firmware (e.g., 9.00) simply by plugging in a USB drive with an older PS4UPDATE.PUP file. Sony’s system software includes anti-rollback mechanisms. However, there is a phenomenon known as Because the author cannot directly link to external
They must manually dump the contents of the console’s flash memory and the SYSCON chip. exploitable firmware version.
Because downgrading is so difficult, the safest and most efficient path to owning a modded console is buying a used PS4 that the previous owner left on an older, exploitable firmware version.