Emerald, I have a USB drive attached to my DIR-655 and it will mount right after I reboot my router. After that it is a matter of time before it unattaches and will not reattach until I reboot the router again. The fact that Sharepoint sees it means that you've done everything right. Something else is going bump in the night and no one seems to be able to pinpoint the problem. I've been feverishly working on the PC side of the issue to see what I can come up with but I'm running out of ideas. Initially, I had firmware version 1.21 and Shareport version 1.14 running. My hardware version is A3. The test I use is to run my drive imaging software, which can take up to 5 hours to complete, and under the aforementioned setup it ran for just over 4 hours before it lost connection. I then decided to upgrade the firmware to the latest version and use the accompanying Shareport software. I have yet to see the drive stay connected for longer than 1 hour before it disconnects. Rebooting the router has been the only way I have found to get it to reattach the drive. I have disabled the NIC and then re enabled it to refresh the network without rebooting the router and this has not worked. If I reboot my PC, when I start Shareport I now am presented with 2 identical hard drives neither of which will connect. Of course, there really is only one but I cannot figure out why it shows 2 and the only way to correct this is to reboot the router. D-link engineers cannot duplicate the problem but my guess is that they are running the test on a pristine setup without all of the myriad software that is added and removed by the common user, not to mention the **** that usually comes preinstalled. If the D-link engineers could concoct a monitoring program that would create a log that we could then ship to D-link (to somehow pinpoint what is happening) would be something I would volunteer for. But, I don't think they know what to look for so how can you write a monitoring program if you don't know what to monitor? I went so far as to install the Netmon software by Microsoft to see if I could get some idea what is happening when the drive detaches. What I found, and this could be speculation, is that I received a flurry of UDP requests from the router just before or during or after the drive detaches. Most of them were identification requests from the DNS. What I noticed is that although I correctly registered my primary and secondary names, it would say that something about it was incorrect. This may all be pie in the sky wishful thinking as I have no idea if the router should query who is on the other end and it doesn't like the answer; would it disconnect my drive? Inquiring minds want to know.