: By redirecting your PS4's download requests, you can trick the console into downloading older game update files ( .pkg ) directly from Sony's servers.
Opening the PS4 console and soldering wires directly to the motherboard's Syscon chip and Nor flash memory.
I can provide the official, malware-free documentation for your exact system setup. Share public link
You cannot downgrade a modern PS4 with a file. You need a soldering iron, a Teensy board, and weeks of learning. Any .exe you find is 99.9% likely to be a virus, ransomware, or a useless fake.