WPeMatico Exporter is a very easy to use WordPress auto-exporter plugin. Organized into campaigns, create XML files automatically from the Posts types of your choice. But its template field also allows make any file type you want, like CSV, HTML, or just as text files.
You could export just the new things or all posts (types) each time, to export/import in other sites or just like a backup.
This new plugin works in conjunction with the FTP and SFTP – SSH protocols so that you can store the exported files on the host of your choice, or you can save it on your own site in a directory exclusively for WPeMatico Exporter.
WordPress 4.1+ (tested to 5.0)