This new feature has several use cases:
In the new backup feature you can either create your Backup manually on the “Import/Export” page, or use the options for wp-cron to generate your backup automatically.
PIN Protectection – you can setup a PIN number to protect the access to the copy of your Glossary Index.
Secure Backup – by default, the feature uses the WP Filesystem API to handle the saving of the backup copy. While this method is highly recommended for security reasons, it requires the FTP credentials in order for it to work. If you cannot or don’t want to use your FTP credentials, you can switch off this option and you files will still be saved.