If you haven’t already done so, see the other recent discussions on Windows 10 File Explorer not showing the My Cloud to see if they may hold solutions to your issue.
https://community.wd.com/t/get-my-cloud-to-show-in-windows-10-file-explorer-network/221468/
https://community.wd.com/t/using-windows-explorer/264855/
It appears some who are using the OS5 firmware are having issues with the My Cloud not showing up properly in Windows File Explorer.
Other troubleshooting steps.
Make sure the Windows 10 Network Profile is set to Private and not Public.
Temporarily disable any third party security or firewall programs and see if the issue continues.
