Mycloud ex2 ultra bricked after os5 update

If WD is unable to help you, you can check out the thread below that is a bit old but may offer some insight into how to get back to a working NAS. Again, go to WD first…

Keep in mind the below link is about the single bay My Cloud and may not be relevant to your unit:
** Check out @Bennor’s post below for a bit more insight into this.