Subclients contain information about what data is backed up. You can create a user-defined subclient to manage and back up specific content.
From the navigation pane, go to Protect > File servers.
The File servers page appears.
Click the file server.
The file server properties page appears.
Under Subclients, click Add subclient.
The Add subclient page appears.
Enter the following information:
Name: Type a name for the subclient.
Backup plan: Select the backup plan to use for the subclient, and then specify which content you want to back up.