After downloading the .ipynb notebook file from D2L you should move (not copy) it to the drive and folder (directory) you’ll be working from.  A good choice would be a folder under your H: drive.  Do not work on files in the Downloads folder-- you will lose your work if the computer reboots.

But you will need to start Jupyter notebook in a folder above the folder with your file so that the Jupyter kernel can access it.  

 

Here’s what I suggest you do in the lab: