This mobile app is for the My Cloud OS 5 limited public release of the following My Cloud products:
My Cloud Mirror (Gen 2)
My Cloud EX2 Ultra
My Cloud EX4100
My Cloud PR2100
My Cloud PR4100
To learn more on how to try out the limited public release, please visit: https://community.wd.com/c/OS5/
Note: The My Cloud OS 5 mobile app requires a compatible My Cloud product to work (sold separately).