This documentation is not using the current rendering mechanism and will be deleted by December 31st, 2020. The extension maintainer should switch to the new system. Details on how to use the rendering mechanism can be found here.
Download and install fal_securedownload through extension manager or clone from https://github.com/beechit/fal_securedownload.git in typo3conf/ext/
Create non public file storage (under rootlevel)
Un-check the ‘public’ checkbox for your existing file storage or create a new file storage and set it to non public
Best is to have the fysical folder outsite of your document root. If not add an .htaccess with “Deny from all” (Apache < 2.3) or “Require all denied” (Apache >= 2.3) in your file storage root folder.
Set fe_group permissions to a file or folder of the non-public file storage