One workaround to the lack of a shutdown option in the Dashboard on the v2.x single bay My Cloud is to just use SSH and issue the shutdown command. Plenty of discussion on how to do so on both the first gen and second gen single bay My Cloud.
https://community.wd.com/search?q=mac%20ssh%20shutdown%20category%3A105
Note: On the single bay My Cloud there is no “on/off” button/switch. Best one can do is halt the system (which is what the shutdown option generally does) then pull power to the My Cloud. It is generally advisable to issue the shutdown command before pulling the power. One could always connect the My Cloud power plug to a “smart plug” and instruct the smart plug to turn off after issuing the shutdown command to the My Cloud.
