Easy to use WordPress File Manager plugin, which enables the users to view, edit and create files in the WordPress folder and its sub-folders. It has simple and elegant interface and can be easily used even by beginners. It has Windows-styled GUI, context menu (right click menu) shortcuts and image editing capabilities.
Version 5.5 (8 October 2015):
Added the feature to restrict visibility of the filemanager for User groups
The above code will allow only administrators to see the filemanager. This will help you add more than one filemanager in the front-end, each for one user group (user role).