I want to show my folders on the left sidebar so I have quick access to the files in them.

I want to show my folders on the left sidebar so I have quick access to the files in them. But I don't want them to also show in the All Files List. 

I only want to show two  Excel documents in the center All Files section.

 

I kind of want it to work like gmail, where I store lots of emails in folders on the left pane, and only a few show in my inbox, front and center.

 

Is there a way to do that?  If not, is there a way to push the folders in the center section down below the Excel files?

 

Thanks in advance.