Have you tried a four second reset by holding in the reset button on t he back of the My Cloud for four seconds?
With respect to slow copying speeds, see the following link for more information:
There are a variety of causes that can generate a slow My Cloud. See the following link for more information:
https://community.wd.com/t/before-you-rma-your-device-lets-talk-about-your-problems/136430
