Which My Cloud version do you have? The v2.x firmware version or the v4.x firmware version?
For the v4.x firmware versions there are two locations where there is a Shutdown option in the Dashboard:
https://community.wd.com/uploads/short-url/kDELVZnunIsgCIJfzAtZEWD3QeX.JPG
If one is using the WD Access program there is also a shutdown option within that program’s task bar icon.
For the v2.x firmware My Cloud units it appears there is a bug in the firmware and the shutdown option is missing from the Dashboard. There is further discussion on the v2.x problem in the following thread including how the v2.x My Cloud User Manual indicates in two separate places a shutdown button but their graphics don’t actually show it.
https://community.wd.com/t/safe-shutdown/147307/
One may be able to use SSH to issue the shutdown command, its what I do rather than log into my v4.x version My Cloud. The thread above goes into some discussion on how to use SSH to shut down or reboot a My Cloud.
