Click the MEDIA tab (1) and then the ADD button (2)

You can upload these file types:

Documents:
'pdf', 'doc', 'docx', 'xls', 'xlsx', 'txt', 'ppt', 'pps', 'pptx',
Media:
'mp3', 'aac', 'ogg', 'wma', 'mp4', 'm4v', 'm4a', 'm4b', 'aiff', 'mov', 'wmv', 'flv', 'swf', 'ico'
Archive:
'tar', 'gz','zip',

Select a compatible file

Drag a file onto your page

Note: movie files will be automatically presented in a player where possible

Add a description (optional)

Optional step: Click in the description line (1) to add a file description. After you publish this file will be downloadable from your site.