Hi @MonikaSutherlan , 

There may be quotas on both course and your account. You will want to connect with your Canvas Administrator to check the quota limits as they can be adjusted. We also have file limit quotas on certain files, just to prevent bogging down the course. Here is a community post on Canvas quotas. The Canvas Administrator can reach out to the Customer Success team with additional questions. 

Cheers! 

CSM Team