Is there a simple way to delete backup created by the backup utility?
rm -R /mnt/dietpi-backup
or the path you chose on backup creation respectively 
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Ok thanks. Feature request to add it to dietpi-backup utility?
Does the utility simply overwrite the previous backup?
Good idea, will add it for v6.14.
Jep the old backup will be overwritten, but with “rsync”, so just the files that really changed.
Btw there is also an open feature request about allowing multiple backups. Maybe I can combine this and add both features directly.
Great 