1 Set Board Hard Drive Tray Downgrade Tool For Ps3 E3 Nor Flasher Console Parts Firmware Backup Downgrade Tool - Accessories - AliExpress
PS3 - Chapter I - PS3 Downgrade General Information | PSX-Place
Index of /images/techs/34718
PS3 Tutorial (2021) - Downgrade from ANY cfw to ANY lower cfw EASY! 2 methods.. with details & tips - YouTube
How To] Downgrade Fat PS3 From 4.66 to 3.55 Firmware Using E3 Flasher Tutorial (Part 1 of 3) - YouTube
I purchased a PS3 backward compatible from ebay for a good price and I'm impressed how clean it is. However... It's still on firmware 2.50. Should I update the firmware? : r/PS3
PS3 3.66 Downgrade Tutorial by The Jailbreak Master 1 | PDF | Play Station 3 | Usb Flash Drive
PS3: Firmware-Downgrade - so geht's - CHIP
Downgradable PS3 Models - Wololo.net
How To Downgrade Your 4.90 CFW PS3 *Easy* - YouTube
PS3 - Chapter I - PS3 Downgrade General Information | PSX-Place