SAS Metadata Backup (SMC): backups metadata only.
BackupManager, the GUI for the SAS Deployment Backup and Restore Utility, will backup: SAS metadata, SAS Content Server, WIP (postgress) database, and the key configuration files of the Application servers, including SAS Meta.
This means the toll won;t backup, by default, SAS data or other important folders (as other SAS services, the LASR files, Autoload, Web Applications, SAS binaries, etc). You can include those folders, of course, but for those purposes I highly recommend you a generic Backup as you would do for other services. But you will need downtime on the SAS services, to not block any file during the backup process.