Confluence pages can be set up in hierarchies, with parent pages and multiple children pages, much like folders and sub-folder hierarchies. Files can be attached to these pages. Go into any space where you have edit rights. Create a new page, lets call it "top", save it. Remaining in the view of "top", click create page again, create one called "middle 1", save it, and remaining in it, create a third one called "bottom". Go back to "top", create another page called "middle 2" Now look at the page tree. You will see a tree structure

top

• middle 1
  • bottom
• middle 2