possibility to assign a star to a file for quick access on the go (i.e. price lists for quick reference)
Often I need to open some specific files on the go for quick referencing like price lists and manuals. A similar function like the star in Adobe Acrobat that allows you to quickly open a starred file without digging into the directories. It will help improving the productivity.
Adrian Silvertown commented
See also same idea "Add Favourites".