[Windows PowerShell cmdlet] Add-OBFileSpec [Description] 
Adds the OBFileSpec object, which specifies the items to include or exclude from a backup, to the backup policy (OBPolicy) object. The OBFileSpec object can include or exclude multiple files, folders, or volumes. The list of items to include can be defined by using the New-OBFileSpec cmdlet, and then you can update the OBPolicy object.