Appreciate the pointers but that appears to be a cross your fingers and hope it works solution.
So 5 hours later I have no NAS out of the box, it’s time for bed and I’m going to have to terminate this process as the battery on my Mac will die before this update completes.
This is honestly one of the most dreadful out-of-the-box product experiences that I’ve ever had.
I’ve not had any problems applying updates, but I have not used the Dashboard UI to perform the update. Did try once and it stuck at 10% as yours did, so did the update via the Linux command line.
All my method does is bypass the Web UI and the script invoked to perform the update is the same script that the Dashboard/Web UI uses.