Drag this link <b><a href="javascript:(function(){document.getElementById(&quot;id_shutdown_td&quot;).style.display%20=%20&quot;block&quot;;})();"> (--Show Hibernate WD My Cloud --)</a></b> to the bookmark bar in your browser </p>

Now in the dashboard navigate to <b>Settings->Utilities</b> page and click the bookmark from bookmark bar.
You will see the hibernate option now :) !!  Just before Reboot button.
It can be clicked to shutdown the device.