Unable to update firmware - Buttons grayed out

My Cloud OS 3 Personal & Network Attached Storage My Cloud EX4
3

Gotcha! I undetstood your problem.
It seems that you have to create a volume first any drive will work

After that you will be able to update. Its strange but it works that way

I needed to use an oldie 500 gb drive just to update the firmware. I didnt have the reds available at that time