Backup in GD Press Tools 4 is very powerful, but, it has some limitations and restrictions that are mostly caused by the way the backup is meant to be used and the way WordPress is organized. So, here is more info in how actually GD Press Tools is creating backups for both database and files.
GD Press Tools 3.8 adds a new panel for backup of the WordPress. Right now, only database backup is supported, backup of files will be added with next major version. New backup supports multiple tasks, scheduler and uploading archives to CDN, with Rackspace only one supported now.