The differences between Safepoint (v4.x) and Backup (v2.x) have been discussed in more than a few past threads. And the lack of certain features, like automating the backup, in v2.x Backup have also been discussed in numerous past threads along with possible ways (using SSH) to get around it. Those threads can be found using the forum search feature, magnifying glass icon upper right.
One can add their voice to others who have requested WD add scheduled backups to the v2.x firmware in the following Cloud Ideas thread.
https://community.wd.com/t/schedule-queue-usb-backups/96993/
