First, which firmware version are you using? V4.x or V2.x?
There are several recent threads that discuss how to shutdown the My Cloud. It appears the v2.x firmware is missing the “shutdown” option as discussed in the following threads.
https://community.wd.com/t/cannot-find-power-off-button-in-dashboard-v2-11-133/151868
https://community.wd.com/t/safe-shutdown/147307
Second there are numerous threads discussing the “sleep” issue with the My Cloud where the drive doesn’t go into sleep mode or is continually waking up so the firmware can perform actions. You can do a search using the forum search feature to find other threads on the sleep issue, here are several recent threads on the sleep issue with some possible workarounds to get the My Cloud to sleep.
