Auto Detect shows my NAS as well but when I click it, the Q10 fails to connect.  I expected it to request a user name and password.
However, if I use the option to manually add my NAS, it requests the server name (I enter the same one shown by auto detect) and I can also enter a folder name, user name and password.  Doing it this way works for me.  For what it's worth, I have a Synology 1515+