Please implement the use of backup_exclude.conf, as used in "Custom Backup".
Because you store an rsync copy of all the user files, in /newbackup (by default) it needlessly consumes a MASSIVE amount of space.
I have two (horrible) Adobe Magento stores, that occupy 9GB. Due to the way CWP backup stores a duplicate, 18GB is used up.
The "Custom Backup" excludes cache files and reduces the backups to just 3GB. This has the benefit of quicker restores, if required, plus a smaller payload for remote backups.