It appears you may have one of the new “generation 2” My Cloud units. A few others previously reported purchasing My Cloud’s recently that shipped with firmware 2.10.310. Unknown if the apps that have been modified to work on first generation My Cloud firmware will work on the Gen 2 versions.
http://community.wd.com/t/latest-my-cloud-mirror-firmware-pre-installed-on-brand-new-my-cloud/145284
http://community.wd.com/t/how-to-sync-two-mycloud-at-different-locations/145528
