You can add the user accounts that you intend to back up to the default subclient.
From the navigation pane, click Protect > Applications > G Suite.
The G Suite apps page appears.
Click an app.
The app page appears.
In the Subclients section, click default.
The default page appears.
In the Content section, click Manage.
The Subclient content dialog box appears.
Click Add user.
The Add users dialog box appears.
In the Name column, select one or more user accounts that you want to add.
Click Add, and then click Save.