Hi,
seems I had the same problem with myCloud (2TB, Firmware is on the latest release: v03.04.01-230)
After running 1-2 days with no problems, it seems to “disappear” from the network:
Ui ist not reachable, shares are not working, no ping on IP address…
The list of devices, shown on my router contains the myCloud entry as “not present”.
The only action, that helped: unplug the power supply for a few seconds.
After reboot, everything is back to normal.
Also this seems to be the same problem here http://community.wd.com/t5/WD-My-Cloud/MyCloud-Device-Disconnects-Itself-from-the-Network-Daily/td-p/742978
So my solution for now is to force a reboot every night via crontab.
If someone finds a better solution, pl let me know.
