So I received a new HD for christmas and hooked it up to my airport extreme base station using its usb connection. I havent had any problems for a few days until just recently. When I try to access the HD through Finder I get an error: "Connection failed The Server may not exist or it is not operational at this time. Check the server name or IP address and your network connection and try again." internet works fine still and i have noticed no other problems except this. if i unplug the base station and plug it back in, then it will work fine again (but not for too long). I am running Mac OS 10.5.1 also if that helps. Thanks in advance.