The default farm backup set is designed to protect all of the data on the client.
You can create a user-defined backup set that may contain any farm component that exists within the SharePoint server. You can use a farm backup set to group SharePoint farm components into separate entities with their own unique backup schedules. For example, creating a user-defined backup set is useful if you need to back up some web applications more frequently than the others.
Procedure
- 
From the CommCell Browser, expand Client Computers > client. 
- 
Right-click SharePoint Server, point to All Tasks, and click Create New Backup Set. The Create New Backup Set dialog box appears. 
- 
Enter the following information about the backup set: - 
In the New Backup Set Name box, type the new backup set name. 
- 
In the Choose Backup Set Type section, select Farm Level. 
- 
In the Storage Policy box, enter a storage policy name that you want to use. 
 
- 
- 
Click OK. 
Result
A new backup set is created with the specified name. A default subclient is created for the new backup set.