You might struggle with the same issue I just a minute ago got solved!
My wireless home net is ok.
However Wd Cloud vanished totally from my laptop’s explorer (Win7 Home Prem. here)
Some how I got via my browser to Wd’s page http://wdmycloud/UI/
There: Settings / Utilities / System Factory Restore / System Only
* Please do notice: choose the first option System ONLY and all your data will be safe *
It takes a good while… Wd’s front light turns white,
another good while, then the light turns again blue
This way I got my Wd Cloud back and am now able to use it!
Have no idea why Wd Cloud vanished in the first place?!
It has worked ok for a longer time and today, also yesterday Wd Cloud just disappeared!
In case this helps you, please choose to give a Kudo!
Would be the very first one. =)