Files with extension .pdf, .txt, and .doc or image file won't be downloaded and will be opened in the browser. To overcome this issue use the download attribute from html5.
Content is the body of information that is available to visitors on a website. It is the subject and substance of the text and graphics. Content can include general information, data, news, stories, poetry, and entertainment, as well as music, photos, and videos; information that enhances knowledge and interest in the brand, institution, or social cause; downloadable or printable material; and interactive "goodies" such as contests, giveaway items, screen savers, and games.