How do I upload a file to a course?
You can add a file to your course by uploading a file. You can also import files using the course import tool in Course Settings.
As an instructor, you can drag and drop files from your personal files into course files.
Note: Video and audio uploads to Canvas through the media tool can be up to 500 MB in size.
Click the Upload button.
Upload Files via Drag and Drop
Some web browsers contain a unique feature that allows the user to add to files by simply dragging and dropping the files from a file window directly into the Canvas file repository. Click the title of the file you wish to add  and drag the file to your open browser . Your file will automatically upload.
Replace Duplicate File
If a file with the same name already exists in the folder where you are uploading your file, you will be asked if you want to replace or rename it.
To rename the file, click Change Name button . This option will create a duplicate copy of the file with a different name.
To replace the file, click the Replace button .