From within your space, you can have up to three levels of sub folders for conversations, tasks, and files. To add a sub folder, go to the conversations, tasks, or files tab and hover over a folder on the left side of the page. Click the drop-down arrow that appears. Then click “Add folder.”
When viewing all conversations, tasks or files with sort set to none, you can also see a full list of the available folders at the top of the page.