I just purchased Dlink DNS 320 NAS. It came with FW 2.00. I connected to my network gateway and it could be managed by WebGUI. I could find it in network (Orignally as dlink-xxxx, then I could change it to the name I want). Everything looks good till that time.
Then I upgraded to FW 2.02 successfully. It could still managed by the WebGUI. But I could not find it on my network. I have tried 3 PC (Win7 Home 64, Win XP Home and Win XP professional). I have also tried something (such as disable my firewall, enable the NetBIOS over TCP/IP, etc) but still not helpful.
Even worse, I could not downgrade to FW 2.00.
I found something interesting when I use a freeware called Network Scanner. I found my NAS IP does not have hostname even I changed workgroup/name back and forth (in Device setting under System Management) in WebGUI.
Currently I do not have hard drive for it (because I plan to put in 2X3TB hard drives but now hard drive is too expensive). I just inserted a USB memory stick to test the NAS. I found that I could not use \\192.168.0.32 (My NAS IP) to access the files in my memory stick. I am not sure that might be another issue with USB function, or could be the same map network drive issue.