Check to ensure NetBIOS over TCP/IP is enabled, that the network is set to Private, ensure Network Discovery and File Sharing is enabled, and ensure the computer is connected to the same router as the My Cloud. See the following post, in particular Windows 10 Specific Method 1 through 6 for additional steps that may be needed.
https://community.wd.com/t/compilation-of-windows-10-methods-steps-and-solutions/142576
