Is the LED orange or red? Red generally indicates a problem with the internal hard drive. Other troubleshooting steps.
Connect the My Cloud to a different networking port on the router.
If using AT&T Uverse there is a known problem between the AT&T supplied router and the My Cloud, the workaround is to use a switch between the My Cloud and router. See this link for more information.
Try a different networking cable.
Connect the My Cloud direct to the computer’s networking port and see if problem persists.
In the end one may have to contact WD Support directly and open a trouble ticket.
