When I update a link it takes me back to my own files to save. Doesn't publish the actual PDF.

When I edit a page and update a link and then preview it takes me back to my own files and wants me to save the document and doesn't show the actual pdf that i uploaded. HELP! Thank goodness I realized before I shared my files with the world.

Menu page. Updating Weekly Specials.
https://sitebuilder.homestead.com/~site/builder/