The issue of no shutdown button in the v2.x firmware My Cloud has been discussed in numerous threads including as recently as yesterday in the following thread:
https://community.wd.com/t/firmware-2-21-111-my-cloud-gen-2-no-shutdown/175793
See the link above for a number of other threads where various methods of shutting down a v2.x firmware My Cloud are discussed.
The v4.x firmware My Cloud’s have a shutdown option in several locations within the My Cloud Dashboard.
The ONLY way at this time to power on a My Cloud is to cycle the power on it. One could use a cheap power timer (like those used for lights) to turn the My Cloud on/off at set times. There are more expensive options for turning devices on/off on a set schedule or via remote methods like home automation.
The My Cloud is designed to be run 24/7.
Before I moved to using SSH from a mobile device to issue the shutdown command on a v4.x firmware My Cloud I would simply switch off the power strip that the My Cloud (and broadband router) where attached to. Using that method I would sometimes get corrupted media files (always video files) for some strange reason. Problem went away once I started shutting down the unit using either the Dashboard shutdown option or the SSH shutdown method. I explain the SSH shutdown methods I use on a v4.x firmware My Cloud in another thread:
