Reverting a PS4 from firmware 13.02 to 9.00 is highly complex. It is not possible through simple software menus or USB updates. Why Version 9.00 is Target Firmware
: Even with hardware modding, a PS4 can generally only "revert" to the immediately preceding firmware version that was installed on that specific console. If you updated from 12.02 to 13.02, you might revert to 12.02, but jumping all the way back to 9.00 is impossible unless that console was never updated past 9.00 in the past. PS4 Firmware Downgrade: Reverting from 11.02 to 11.00 ps4 downgrade 13.02 to 9.00
To go all the way back to 9.00 from 13.02, your console must have sat on firmware 9.00 immediately before you updated to 13.02, without any intermediate updates (like 10.00, 11.00, or 12.00) in between. Reverting a PS4 from firmware 13