You can attach a file to any page. This makes it easier to manage. For instance, you can attach a file to this page.

I attached http://wusb.fm/files/Mose.JPG. I can use it as a link like that or since it's an image I can do an image tag like this and show it on the page.

The file is on the server so you can link to it from anywhere, not just this page or this website.