Catalina OS

If you are using the WD Desktop program it should be noted it is no longer supported by WD and will stop working/connecting to a My Cloud with the very latest firmware.

My Cloud Desktop App No Longer Works with a My Cloud or Login Not Authorized
https://support-en.wd.com/app/answers/detail/a_id/25159

WD has updated the iOS app, see the following thread for more information.