1. Open your course > navigate to the Content Page

2. Click on the Unit/Module that you want to add the file to.

3. In the upper right click Add Existing.

4. From this page you can either drag the file to the Drag and Drop box or click "browse" to locate the file a different way.

5. Once the document has been uploaded you will be brought back to the Content page. Here you can see that the file has been added to the Unit/Module you had selected.

Note: if you would like to move the item you can drag and drop it.