Navbar adds a new funtionality to the Workbench. It is a file manager, but unlike like its predecessor, is full integrated into the Workbench.
Rather than running it as a separate program on its own screen or window, and switching to it whenever you need to copy, delete or view files, it forms an integral part of the familiar Workbench environment, adding its power and ease of use to all Workbench operations.
If you want to improve the speed and efficiency of Workbench in a way that suits your needs, Navbar is the way to go.
Navbar needs AmigaOS4