title: How would I structure this database?
body: <p>Apologies for another question on a similar topic, but I'm inexperienced at this level of database development.</p>
  
  <p>I have a project in which users join projects, a page where content is loaded dynamically from a MySQL database. I've been exploring foreign keys and the like to deal with the many-to-many aspects of having several users to a project and vice versa, but where should all of the content that is loaded into each project be stored? Amongst other things, I have a chat window and a place to upload and download files.</p>