I had the same problem as have many others that v4 firmware version is absolute garbage !!.
Downgrade your firmware to version 3 and turn off auto update if you have it switched on and all your problems will go away.
WD really need to fix this with an updated firmware that does not cause all the problems of dropped network connection sooooo slooooow! performance. etc etc etc …
Search on this forum the instructions to downgrade are on here and it’s really easy to do!
It must be cos I managed it and now all is working fine!
Your question is the same as mine. I had found an earlier firmware after a search, but it will not install, so it may not be a proper version. My question is down the list under my RoyFC name.
As of right now, I followed a suggestion on another thread and turned off the media settings under “Media” in the Dashboard. So far my device has not disconnected, but it has only been a couple days. What it does do, however, is often show 0% Used and “Unknown” for temperature under Quickview. I can live with that if it does not disconnect again.
If you use your Cloud as a media server, though, then the above idea is not an option for you.
The WD Firmware 4.00.00-607 has bascially made my WD My Cloud not usable. That firmware has been out nearly 2 months with the Internet littered with complaints about it. Why hasn’t WD issued a fix?