What “mycloud app” are you using on Windows 10? The My Cloud Dashboard using a web browser? Or the My Cloud Desktop program/software for Windows?
The My Cloud Desktop program has been End of Life since 2016. Recent firmware updates render the My Cloud Desktop program unusable as it will no longer let one log into their My Cloud. For local network access one does not need to use the My Cloud Desktop program, one can use Windows File Explorer or Mac Finder. The WD Knowledgebase article on the WD My Cloud Desktop program no longer supported.
My Cloud Desktop App No Longer Works with a My Cloud or Login Not Authorized
Certain Microsoft updates to Windows 10 will disable SMB1 which will cause Windows File Explorer to not see the My Cloud under Network.
How to Enable SMB 1.0/CIFS File Sharing Support on Windows 10