Device Offline - This device is inaccessible

What external ports are you forwarding to the NAS? If you have forwarded external ports 80 and 443 to the NAS internal ports 80 and 443, be aware that some ISP are blocking access to port 80. To remedy this, you will have to choose other external ports to forward to your NAS. For example 8080 to 80, and 8443 to 443