Snapshot backups capture the changes to the database after the snapshot is taken. Snapshots initially use less storage than external backup files and take just a few minutes regardless of database size.

Snapshot backups are stored in files called delta files or delta disks on the same data store as the database.

The following are points to consider about using Snapshot backups.

Because snapshots reside on the same data store as the database, they do not protect against data loss due to failure of the data storage.

As the database changes, the changes require more and more space on the virtual disk. That space is generally more expensive than backup storage.

The recovery process from snapshots is not faster than the recovery process from an external backup.

If you have snapshots, you cannot extend the data disk.