Question about WD Elements Portable

No, this model does not have a built-in Wi-Fi module; it only works wired via the included USB cable. The only way to access it via Wi-Fi on your local network is to plug it into the USB port of your internet router (most current boxes have a file sharing / mini-NAS function) to make it visible from your other devices.

This is a USB disc without network functionality. It can only be connected to the PC / notebook USB or to the router USB port (if the router supports an external USB port). This means that the disc would be "in the network", albeit indirectly

I think night, you have to use cable.