Hello I have this network at home: Cable modem from my ISP Router - DLink - DIR-825 MacMini - connected to the routher via 1gb LAN cable ExtHDD - Western digital 3TB, connected to the routher via 1gb LAN cable MacBook - connected via Wifi In MacMini is ExtHDD mapped via SMB protocol and is still connected. In Macbook is ExtHDD mapped also via SMB protocol and is still connected. I dont have any requests to the external HDD, but extHDD is still working, like as someone is downloading or uploading into it. Sooner, I had my old extHDD connected via USB directly to my MacMini and HDD worked fine. New extHDD can be connected only by LAN cable, so i cant use USB connection like before. Dont you know, where could be problem?