by "radiator" Do you mean RAIDar, or FrontView?
From Windows, normally you open windows explorer (not internet explorer) and enter
\\NASNAME\sharename into the address bar.
You can also enter \\xxx.xxx.xxx.xxx\sharename , where the "xxx..." is the IP address of the Duo.
Either way, you will likely get a prompt for username / password. You can enter admin and the password you configured on the DUO.