Hi @johngreen ,
This screen is indeed indicative of SSD failure, I suspect that the SSD on your Nucleus is faulty, unfortunately, it happens with hard drives from time to time. We will need to get your Nucleus sent in for repair.
I see that you signed up for Roon with a UK account, and assuming you bought your Nucleus from a UK dealer, you would need to return the unit to the dealer for repairs. Then they can work with our UK Roon distributor to facilitate the hard drive replacement.
Any questions, please do let us know, and feel free to point your Roon dealer to this thread to let them know of our assessment here, thank you.