Are you sure that you can download metadata? Favorites, lists, posts, reviews, collections, and web archives? I don't think it's possible. Even saving the HTML of the page is tricky because the site renders the content using JavaScript.
Of course you can download your own uploads, but it's likely you have them in your local backups already if you uploaded them?
Of course you can download your own uploads, but it's likely you have them in your local backups already if you uploaded them?