The easiest way to upload files from your local hard disk to your web server is using FTP (File Transfer Protocol). All web hosting providers (bar a select few) will provide FTP access to your website.

Mirage-Net Hosting gives you multiple FTP accounts. This can be useful if you have several web developers working on the website, and you want each to have their own username and password with which to access the website.

Mirage-Net Hosting also allows for anonymous FTP access. This lets visitors to your website upload files, and can be useful for websites where content is mostly supplied by its audience.