I needed a simple file manager for a professional project. The components available for Joomla are extremely powerful, but because of this they were not suitable for my project.
After some research I found the module "Easy Folder Listing" by Michael Gilkes. The basic idea was fascinating: this module simply displays the contents of a selected folder on the server. Because I needed significant enhancements for my project, I decided to recode Michael Gilkes module completely.
The result is DVFolderContent. It follows the basic principle of "Easy Folder Listing", but was greatly expanded. In particular, a lot of options for controlling the display using access levels have been implemented. The uploading of files controlled by access levels is possible too. The file links are encrypted, so that no association to the physical location of the files on the server are possible.