The exploit method used for PS 5 have been tested on PS 4 too | Cybertips / ሳይበር ቲፕስ

The exploit method used for PS 5 have been tested on PS 4 too but unfortunately on system frameware 9.03 it have been patched as you can see. The good news is if you are tired of using USB flash drive for 9.00 jailbreak the new method might let us stop using USB flash drive and make the jailbreak like the old ways