From the Quick Search feature or the Project view list, you can access project documents for a project directly.
Quick Search View:
Project List View:
After opening the document section you will be able to access default folders to upload and view documents.
To set up your default folders access Owner Settings and then System Settings.
When System Settings displays select "Project Folders"
To make changes to existing folders, toggle on the Show Inactive option if you wish to see all folder options that were previously created.
Click on the edit button 
Edit a Folder
Change the name of the folder
Toggle on to Active
Select the Role Access Level
Create a Folder
Click on Project Folders
Add in the name
Toggle on to Active
Select the Role Access Level
Click on Create
These folders will then be added automatically to any NEW projects.