The present version simply places images and files as HTML in to the post.
For this feature to be present uploaded images and files within a post would need to be placed within it's own table or table filed within the database.
Version 8 use to place uploaded content in to a table filed within the database, but this was removed in version 9 due to the extra complexity causing issues and being limited on the number of included images and files within a post to just 3 or 4.
The present system of placing the HTML for the image or file URL within the post is not limited on the number of images or files you cab include within a post.