From the VM group content dialog box, you can create volume filters to exclude instance volumes from backups.
From the navigation pane, go to Protect > Virtualization.
The Virtual machines page appears.
On the Hypervisors tab, click the hypervisor.
The hypervisor page appears. The VM groups area displays summary information for any existing VM groups.
Click an existing VM group.
Under Content, click Manage.
The VM group content dialog box appears.
The Disk Filters tab shows disks to be excluded from backups.
On the Disk Filters tab, to remove a filter, click in the Actions column of the row for the filter and select Remove.
To exclude virtual machine disks, click Add disk filter.
In the Add disk filter dialog box, provide information for the rule:
From the Disk filter type list, choose one of the following:
Volume name/pattern: In the Volume name/pattern box, enter the display name of the volume or a pattern using wildcards (for example, Data* to identify volumes for which the volume name begins with "Data").
Volume type: To filter the operating system volume, select OS Disk (the only value).
To edit a rule, click in the Actions column of the row for the filter and select Edit rule.
Click OK to save the changes to VM group content.