Applies to ONTAP 9 Answer Files with the ".Zone.Identifier" extension are known as Alternative Data Streams (ADS), which are special types of files. The addition of " .Zone.Identifier " to the filenam...Applies to ONTAP 9 Answer Files with the ".Zone.Identifier" extension are known as Alternative Data Streams (ADS), which are special types of files. The addition of " .Zone.Identifier " to the filename is expected behavior. Additional Information Considerations when auditing alternate NTFS data streams