Backup SLAs allow you to group backup policies and schedules for multiple storage instances. In general, a storage instance should have only one backup policy so as to always have an easy-to-interpret configuration.
Each policy can have multiple schedules assigned so that you can define more complex schedules so that backups are executed even multiple times each day and with different backup types.
schedules define the type of backup - full or incremental
currently, the incremental forever backup approach is not supported, as it may result in a very long chain, which takes a considerable amount of time during restore procedures (data merge)
the approach we highly recommend is to create a schedule for periodic full backup and always assign at least 1 such schedule in the backup SLAs
in order to create incremental backups, you need to always have at least 1 incremental backup schedule and run at least one full backup