To upload multimedia files to a class wiki, you must first go to the wiki URL in your web browser. Then click "Join this Wiki" in the left sidebar to create a username with your first name and class period along with a password and email. Once your membership is approved, go to the class wiki page, click "Edit Page", then "File", "Upload" to select the file and click save. For audio files, you need to upload all related audio files as well.