Sounds like you have successfully gotten all 300 Pages imported based on the comments. (Regardless of how you did it, either by using the WordPress import plugin or by using some MySQL tool like phpMyAdmin or Sequel Pro or whatever)… You have 300 pages in the wp_posts table. Let’s start from here then… The ACF … Read more
W3-Total Cache has a feature that will scan all your posts and import any external images into the media library and change the paths to the new location. See Screenshot
There is this plugin: Automatic Featured Image Posts Plugin From the plugin page: Automatic Featured Image Posts creates a new post with a Featured Image every time an image is uploaded. Through the plugin settings page, you can set the image to publish and assign itself to one of your other existing custom post types … Read more