Hi,
Use Setting Remove local backup.
If Checked then it will remove local backup.
Use this option only when you have set any destination.
If sometimes you need only external backup.
WP database Backup plugin store backup on following destination
Email Notification
Store database backup on FTP
Store database backup on Google drive
Store database backup on Dropbox
Store database backup on Amazon S3
wpseeds.com/documentation/docs/wp-database-backup/destination/
You can store Number of backups on local storage
Go to Dashboard=>Tool=>WP-DB Backup > Settings > Number of backups in the admin dashboard. Enter Number of backups to store on this server.wp-database-backup-settings
Past this limit older backups will be deleted automatically.
The disk that your backup is saved on doesn’t have enough free space? Backup disk is almost full? Low disk space for backup? Backup failed due to lack of space? As you may set up a schedule to automatically do backup daily or weekly, and the size of disk space is limited, so your backup disk will run out of space quickly or someday. It is a real pain to manually delete old backups. Don’t worry about it. WP Database Backup makes it easy to delete old backup files automatically.