If the system refuses to accept the USB drive or you are getting error codes like SU-41350-3 , check these specific troubleshooting points:
I notice you’re asking about , specifically mentioning “paper” — possibly meaning a paper-based guide or a paper trick (like the PS4 jailbreak paperclip method). downgrade ps4 903 to 900 fix
Sony’s PlayStation 4 firmware updates are designed to patch security vulnerabilities and block jailbreak exploits. For the homebrew and backup loading community, firmware was a golden era. It offered a stable, userland exploit via a simple USB exFAT drive. If the system refuses to accept the USB
Some claim you can revert by restoring old save files. Saves are encrypted per firmware. downgrade ps4 903 to 900 fix
You must hardware-trigger the console to read from that inactive slot.