I would allow direct downloading a file tree (or folder, whatever) directly from my website.
I will explain a bit more. My webhoster use Windows server 2012r2 and all websites are made with IIS service. The FTP is also made with IIS.
In this case, I want my users to directly download a folder from a button on my website. My question is : Does windows IIS (as FTP server) authorize the direct download of folders?