Navigating folders can be accomplished by using either the folder tree or the main view and breadcrumbs.
Step-by-Step
How to Navigate Folders
Click on Quizzes.
In the Folder Tree, click on a folder name to select that folder. Selecting a folder will display its contents in the main view.
In the Folder Tree, double click the folder name, or click the chevron icon the the left of the folder name, to display subfolders.
When selecting subfolders, Breadcrumbs will be displayed showing the path to that subfolder.
Click the folder name in either the tree, breadcrumbs, or main view to navigate to that folder and view its contents.