Because your using Windows 10 you may want to review the following discussion that has a variety of things to check on Windows 10. In particular ensuring both the Windows 10 PC and the My Cloud are using the same workgroup name. That Windows 10 has NetBIOS over TCP/IP enabled. That the Windows 10 network setting is configured for Private and not Public. And above all, ensure Windows 10 has all the latest updates applied.
https://community.wd.com/t/compilation-of-windows-10-methods-steps-and-solutions/142576/
From that discussion, try General Method 1 OR General Method 2, then move on to trying Windows 10 Specific Method 1 through Windows 10 Specific Method 5.
