Network attached Cloud storage

Just started Comcast/Xfinity moving my Centurylink network to Xfinity.

Internet is fine but I can not figure out how to get the Xfinity supplied Modem/Router to recognize my WD (Western Digital) Cloud storage. It worked just fine on my old Centurylink supplied Modem/Router combination.

It is installed via a Ethernet port.

Contacted WD support and they said the new modem/router is not recognizing the device.

The MAC address of the device does not show in the l"Router Attached Devices or UPnP Table".

How do I get the Xfinity Modem/Router to recognize my cloud device?

I have spent several hours today talking to m,ultiple levels of Xfinity support to no avail. The last one did not even know what a disk drive was believe it ot not and the person was a third level support person.

Any help would be appreciated.