I'm not quite sure why dropbox is still a recommended hoster for files. I've been reading countless guides (being the noob that I am), and many times the images won't load. A quick hover will reveal that 90% of the time, the image was stored on dropbox. Sometimes, a dropbox hosted resource will lead to a 404 error. Personally, a site such as imgur would be better, since it doesn't run the risk of being 404'd, and it won't take up your personal dropbox space. As for files, maybe mediafire?