If you haven’t seen these prior threads you may want to take a look at them since they involve using/enabling NFS support.
http://community.wd.com/t/nfs-access-mycloud-gen-2/159622
http://community.wd.com/t/nfsv4-on-my-cloud/156862
There are more threads on NFS that can be found using the forum search option (magnifying glass icon upper right). Here are a few:
http://community.wd.com/t/wd-my-cloud-file-system-type-ubuntu-connection-question/156621
http://community.wd.com/t/nfs-mount-out-of-space/154744
http://community.wd.com/t/mount-share-using-nfs-in-windows-10-ultimate/149308
