Specify the third-party backup location.
If the backup file is already uploaded inside your Virtuozzo Container, set the option button to the File inside Virtuozzo Container and paste the full path to the file into the field at this option.
OR
If the backup file is stored at your local computer or somewhere else, set the option button to the Upload a file, paste the full path to the file into the field at this option or click the Browse button and locate the backup file.