Firmware update hangs at 10 percent

My Cloud OS 3 Personal & Network Attached Storage My Cloud
2

Did you try to refresh the page in the browser?

Note: it does get stuck at 10%, but then it should update… Maybe the browser didn’t refresh in your case…

If the light of the NAS is blue in the front, unplug the power and plug it back.

BTW: you are better off not upgrading to the latest firmware.

If you have upgraded, you might want to consider rolling back to the previous version:

http://community.wd.com/t5/WD-My-Cloud/Easy-method-to-downgrade-to-previous-version-of-the-firmware/td-p/773073