This article discusses how you can add a file from your OneDrive to your course.
First, you go to content and navigate to the unit/lesson where you want to add the file. Then click on Add Existing.
Click More and then choose Microsoft OneDrive.

On the first time and after restarting, you may be asked to connect to Teams. Allow this and log in with your HHS credentials.
Select the correct file from your OneDrive and choose to Embed or Link.

- The file is automatically set to visible for students. If you do not yet want students to have access to the file, set it to not visible.
You can even edit editable files such as Word and Excel in Brightspace after posting. To do this, click Edit Document. Students, of course, cannot do this.
Note that this does not change the file on your OneDrive. The original file remains. Also, changes to the file on OneDrive will not be reflected in Brightspace; you will have to upload the file again.