Backup using sync option

This is a great product one flaw how do I use the sync option and make the source the master so it deletes files from destination folder

Thank you for your message.
Delete propagation in sync will be available in version Comodo Backup version 4.
You can try a BETA release of version 4 from or wait for the final release.

Sync doesn’t delete files from destination folder? What’s the point to call it “sync”? This is a feature that CB 1.x had.