What’s it for?
HFS was designed to share files.
What is it?
It is actually a web server. Your friends will download files as you was a website.
They can use a web browser, as Internet Explorer.
Most web servers are designed to publish a website. HFS is designed to share your files, but you are free to use it in any other way, always at your risk. Just keep in mind it is not designed to do that.
What HFS stands for?
HTTP File Server真的蠻好用的說(起碼有最基本的使用者認證，打帳號和密碼:p)