ACF will save the field groups as JSON files, if you have created a directory with the name acf-json. Then, the ACF plugin will get the fields information from your files and not from the WordPress database.
With our extension you can save the JSON files generated from Advanced Custom Fields (ACF) in the plugin directory. If you change your Theme, your WordPress intance will continue to work with the created ACF field groups and you won’t lose them.
This Plugin works only if you have ACF up 5.0.0 installed and activated on your system. The plugin doesn’t have a configuration back-end page.