Hello,
This is the description found on WD website about the new WD Bakcup.
“WD Backup is an easy-to-use backup application. It automatically protects your files, photos and documents with on premise backups to a WD drive as primary storage. Off-premise backups to a cloud as secondary storage for disaster recovery purpose.”
Take a look at this link also:
http://community.wd.com/t5/News-Announcements/New-Software-WD-Backup-5-27-15/td-p/876832