Microsoft has released KB 3140743 on March 1, 2016.
Among the fixes is the following:
“Improved reliability in numerous areas, including OS and Windows Update installation, startup, installing and configuring Windows for the first time, authentication, resuming from hibernation, shutdown, kernel, Start menu, storage, Windows Hello, display modes, Miracast, AppLocker, Internet Explorer 11, Microsoft Edge browser, network connectivity and discovery, and File Explorer.”
Also released on March 1, 2016 was KB 3139907.
Posted this information to the Compilation of Windows 10 Methods, Steps and Solutions thread as well.
Installing it now to a Windows 10 PC that had trouble seeing the My Cloud in Windows File Explorer.
Edit to add: Thread title changed. Update applied and so far my Windows 10 test box is now seeing the My Cloud properly under Windows File Explorer. (knock on wood)