When it comes to migrating a site, these are the steps that I take.
- Download all the files on the site
- Export the database (using phpMyAdmin)
- Upload the files to the new site
- Import to the new database (phpMyAdmin)
- Modify wp-config.php to point to the new database
- If needed use this tool to do DB modification if the domain name needs to be changed https://interconnectit.com/products/search-and-replace-for-wordpress-databases/
If you are looking to migrate only a single post type and the images associated with the acf fields of this post type, there isn’t a way to do this easily, it could be impossible.
