Online Documentation for SQL Administrator for SQL Server
Selecting database files to backup
This step allows you to select files and filegroups of the database to backup.
This step appears only if Back up a single database option was selected on the first step.
To add a file to the backup, select it in the list and set the respective flag in the Back Up column.
To add all files to the backup, check the Backup entire database option.
Click the Next button to proceed to the Selecting backup devices step of the wizard.