When I start the Nas, it works wonderfully for about a half hour. Then my file transfers fail and I get the error that the drive is unreachable. I go through the process of stopping and starting it again and the same thing happens. When it becomes unreachable, I cannot access it by HTTP, in my network places, or by mapped drives. Yet I can ping it. When it is working, it is great. Then boom it is gone. Any suggestions? Thanks.