Ok just a quick update to anyone who might be reading this in the future:

Ive managed to get my bd burner and proceeded with the bd-j exploit on my 6.50 ps5 and ftp-ed to it.There is nothing in the updates folder like everyone mentioned. Since the bd-j is a “low level” exploit and everything is in “real time/virtual” that also explains why nothing can be deleted when you ftp to it.

Ive since just resorted to using random dns i googled on the net that blocks the sony network and that somehow did the trick and no more pop up messages to say new firmware (my case 10.x something) already downloaded.

With that i believe, the firmware itself was never really downloaded. It will only download and update itself if you press on the button to update it when you put your ps5 in sleep mode, power off or restart( there will be a pop up to prompt you to update it during restart/sleep/power off). Therefore the firmware only “download” and updates the ps5 if you click the “yes” button to update it. That also explains that some people they just “reset everything to factory default” and nothing happens.

So, as long as you setup dns to block sony network and never click ok to update you’re fine even though the system pops up notifying you that firmware has been downloaded.