Hacking PS3 Not detecting USB

[ThunderbInazuma]

Hi guys. I'm planning to hack my PS3 and I'm following this guide: https://gbatemp.net/threads/guide-ps3-4-82-cfw-installation-for-dummies.491117/
It is a Slim one. I'm trying to see if it is true compatible but, however, on the "MVC Firmware Checker" it doesn't detect any USB stick I try to use.
How can I resolve this?
Thanks in advance

 

[ThunderbInazuma]

Ok, got it working with the 7th usb stick. If a moderator could delete my post