ok i logged in using the web based UI (so I must have been using the right password..) and it got stuck in a sort of formatting loop.. I think caused by starting and abruptly stopping the setup wizard. I'm going to go ahead and format now as it looks like the data is lost anyway (nothing lost as such, just need to leave it all night copying on again)
As you stated in your original post, you initiated the startup wizard and may have done something that caused the DNS-320L HDDs to be reconfigured/reformatted.
Going forward, please keep in mind that any changes to your PC have no impact on the DNS-320L. As I stated earlier, the DNS-320L is a self-contained storage device with no dependencies to your PC. Consider the fact that the DNS-320L is designed to work with multiple PCs on the same LAN (e.g. a LAN with 15 PCs).
The setup wizard is not required to remap the DNS-320L on a new or formatted PC. You simply need to create a network map. The only thing that can cause the map to fail are (1) wrong IP address entered; (2) wrong username/password combination used; and (3) wrong address format used in the network map setup