This video walks you through the steps to upload content to your project.
Within the content space, navigate to the folder destination that you want your new content to go into. You can also create a subfolder for your content by using "Create folder". Click "Add content" on the top right, and it will open your desktop file manager where you can select the file(s) you would like to add.
Once you've selected the files you would like to upload, you will see the progress in the bottom left; the larger or more complex the file, the longer it will usually take to upload. You can see that processing files has the loading spinner in the list as the process. For our file best practices and must-dos, see this article.