One option while not optimal is to use the WD Sync program which will sync folders from a local PC to the remote My Cloud.
Before WD removed the remote drive mapping option in WD2Go.com it would have been possible to use a remotely mapped drive as a backup location with any backup program that supports backing up to mapped drives. Others are voicing their displeasure at loosing that very important feature with the OS 3/MyCloud.com update at this link: Re-Enable Remote Drive Mapping Through MyCloud.com
There may be ways via SSH to send content to the My Cloud remotely but it involves port forwarding through the firewall on the broadband router/gateway that the My Cloud is connected too. Others who are more knowledgeable about SSH can opine about the various potential ways to do so through SSH.
