You can upload almost any file format into the Media Manager. The following instructions is for uploading an image, but other formats like PDF, Word Docs, Text files, etc may be uploaded.
1.) Open the Media Manager under the Content tab.
2.) Select the location where the file will be store. In this example, the 'Headers' folder.
3.) Click the Upload button in the upper left.
4.) Click the "Choose" button to find the file on your local harddrive. Follow prompts to select the file.
5.) Click the "Start Upload".
6.) You should get a success message when completed.
7.) Done.