Is there any plugin out there that can scan all the images on a blog post and save them to the media

I recently just moved my blog from Squarespace to WordPress. When importing all my posts from Squarespace it brought the images over with just links to the image on the Squarespace servers. I have hundreds of posts so going through one by one and uploading the image to wordpress and then replacing the images would be a nightmare.

Anyone know of a solution that will scan the blog posts and find the images save them to wordpress and use that image in its place?