Many of us post files to our course to provide additional resources to students. A Powerpoint file, Word document, or any other file type can be easily uploaded to your course's main page by either browsing and selecting the file from your computer, or even by dragging and dropping the file directly onto the course page. Detailed instructions for adding files are available in the Learning House Knowledgebase here.
Do you have several related files to upload? Consider creating a folder on your home page by using the following steps: Turn Editing On > Add an activity or resource > choose Folder and click Add > Name the Folder & choose Files in the Content area.