I too am also looking for the answer to this problem. My district has created a shared drive that houses thousands of materials for our French Programs. This are things that we need on a daily basis to post in our classes to do our job. Yet, currently in Canvas, we are not able to access these files on the shared drive, only the files on our personal drives. This is something that needs to resolved ASAP. There is not enough time in the day to constantly be making copies of materials to place in our personal Google Drive, to upload into Canvas. And clearly we are not the only people with this problem. PLEASE figure out a way for teachers to access their SHARED GOOGLE DRIVES in order to do our jobs efficiently!