Folders can be stored per user as favourites in the upper area of the folder navigation. So you always have quick access to your most important folders and folder often used.

 

 

You can drag the required folders simply per Drag&Drop from the folder structure to the folder favourites. Alternatively you can add a folder to the favourites by choosing "add to favourites" via the context menu.

 

 

You can delete the folder again from the favourites via the context menu in the folder favourites, manually move folder in the order and change the sortation