Hi @B.Lab , pretty late my reply, but did you already solve the problem yourself?
While I was dealing with another customer who had the same issue, I did find another thread where yet another user found the reason and the cure.
Have a look here.
Hi, I’ve had this problem and the issue was the external drive had changed it’s extension eg My stuff H to My stuff; I and when I fixed that all went back to normal. Let me know