To specify the content to back up, add a content group to the Azure Files repository.
You can use a wildcard to represent one or more characters when you define the content for backups and filters for a content group.
From the navigation pane, go to Protect > Object storage.
The Object storage page appears.
Click the object storage repository.
The object storage repository properties page appears.
In the upper-right corner of the page, click Add content group.
The Add content group dialog box appears.
In the Name box, enter a name for the content group.
From the Backup plan list, select the server plan to use for the content group.
In the Backup path box, enter the path to the content to include in the content group.