Thanks for your response.
The error is showing on the hardware, not the GUI
Does this help (attached) - That’s the roon nucleus on top of the Melco. I presume the Melco is the core and the Nucleus is the storage? The Melco, Nucleus and the Meridian 218 all plug into the same network switch (TP-Link)
This is a really inadvisable way to run your Nucleus. You should never put anything on top of it, and make sure it has ample airflow. You are reducing its lifespan quite a bit by not giving it proper ventilation.
No, it’d be the other way around. Nucleus is the Roon Core, and the Melco is like a NAS (storage).
Yes. From that error, it looks like the Melco’s internal drive(s) have failed.
I don’t know why you have the Melco (there may be a good reason), but I personally would put an SSD inside the Nucleus and scrap the Melco.