Here's how to add a file to a Canvas module:
1. To the right of the module, click the + sign.
2. Use the drop-down menu at the top to select the "File" option
3. Highlight [Create File(s)]:
4. Click Choose Files and select the desired files from your computer. Once the file is selected, click Add Item in the bottom:
Best practice: When adding four or more files to a module, create a page in the module, add a descriptive label (e.g. "Readings" or "Additional Resources"), and link the files to it.