I just purchased the DNS 321 and so far everything is perfect. My question is that I want to secure the drives from unwanted vistors. I have a few friends that come over and use my network and I do not want them to access the files on it. So I made two users and one group, but now when I try to connect to it via mapped drive it says it is not available. I was hoping when I clicked on it that it would ask me for a username and password. How do I secure it and still access the drive with my username and password? Any help would be greatly appreciated. I have windows 7 - 64 bit and the mapped drive is E - I have one 2 TB hard drive in it for now. Upgrading to two 2 TB drives, but I wanted to see how one worked first before installing the second one.