There are questions raised why MS SQL backups are running as full backups and there are no differentials.
The reasons may be following:
- SQL Server Recovery Model is Simple.
To have differential backups, one should switch Recovery Model to Full.
For more information, check the Microsoft KBA: https://msdn.microsoft.com/en-us/library/ms189275.aspx;
- another backup software is running MS SQL backups that truncate logs;