I got an EX2 ultra couple of days ago.
Upload and streaming speeds are fine. Operating it through the mycloud webpage is usually fine. Interacting with it through Windows 10 explorer is agonising.
To give you an example it took 4 minutes for it to delete one empty folder. To get to that stage it caused windows explorer to freeze on two separate computers. Before that it was freezing windows explorer guaranteed for every single attempt.
What is wrong with this thing? Rebooting does nothing to cure it.