Retention of MongoDB Backups
To set an automatic removal of old backups, you can set the retention policy for MongoDB backups during the application backup policy configuration. After that, Veeam Backup & Replication automatically deletes backup files which are older than specified number of days. For details, see Storage Settings.
In the storage settings, you can also set the GFS (Grandfather-Father-Son) retention scheme. This scheme allows you to store MongoDB backups for long periods of time — for weeks, months and years. To learn more, see the Long-Term Retention Policy (GFS) section in the Veeam Backup & Replication User Guide.
Also, you can manually delete backups from a backup repository using the Veeam Backup & Replication console. For details, see Deleting Backups Manually Using Veeam Backup & Replication Console.