I installed the My Cloud app (works fine) and then added My Cloud as a location to the iOS Files app. it shows the root (MyCloudEX2Ultra), but after that it only says Content Unavailable and if I try to add a folder it says No Share Access. Any help out there for this?
This seems a iOS File App specific issue. I would suggest you to contact Apple Support in this concern.
What is the ios files app being used?