Going back from OS5 to previous system when doing a reset at WDmycloud?

[drimlimit]

Hello all,
following the steps of Jaspertan in this thread :

Tranmission

so seems like there is (an unsupported) way to downgrade:

, I was able to downgrade from OS 5 to 3, but the process is a little risky
fortubately, I bought the ex2 ultra two months ago, and I use it throught docker; without it this nas is like a stone…