First make sure to install ALL Windows 10 updates.
Second you may want to review the following thread which has a bunch of Windows 10 specific suggestions when it comes to the My Cloud.
https://community.wd.com/t/compilation-of-windows-10-methods-steps-and-solutions/142576
Third, make sure you are only using one set of My Cloud Dashboard created credentials when mapping multiple Shares from the My Cloud.
Fourth, make sure to assign the My Cloud a static IP address. Sometimes if the IP address changes the drive mapping may be broken.
Fifth, when mapping the Share make sure to select “connect at sign in”.
Every once in a while I get a cannot reconnect mapped drive when the computer is started or rebooted. Usually just clicking on the mapped drive in Windows File Explorer is enough to fix the issue. I suspect that what is happening is that Windows is attempting to connect to the mapped drives before the network stack has fully initialized and the computer has connected to the local network.
