WinCopies
WinCopies is a free and open-source file system explorer software. It is currently still in development, so you can test it and report any bug you find at the WinCopies' GitHub repository.
WinCopies uses the .Net 5, WinCopies and Windows API Code Pack frameworks. Before launching WinCopies, make sure you have the .Net 5 framework installed on your computer (at least version 5.0).