Backup Exec Open File Option for Windows NT/2000. This product is designed to use in conjunction with Backup Exec for Windows NT/2000, which is sold separately. Backup Exec Open File Option ensures that every file on your network is protected even if it is being used. Perfect for use alone or with our specific database agents, this option can handle open files at the volume level and is seamlessly integrated into Backup Exec. No need to know which files are open ahead of time, just set a scheduled backup to use this option with a simple mouse click.