I’ve just been trying this out on my system. I have a NUC running ROCK (so similar to your Nucleus). I shared a folder (H:\Roon Backup) on a Windows 10 PC to the network and then went to the Roon Settings/Backup screens to add a new Backup schedule using that folder.
First, I tried without including a username and password and then I did indeed get the “unexpected error” message
Since I had shared the folder while running Windows 10 with my Microsoft Account, I then repeated the add folder operation using these credentials. However, this time I got an “unauthorized” error instead:
That tells me that I need to use the local username in place of the cloud-based Microsoft account. You can see what the local username is by going to the C:\Users\ directory and using the name of your user folder, in my case it would be gcoup. So, using gcoup and my Microsoft Account password, and the new backup folder was added…
