To transfer files from your hard drive to the web server and vice versa you'll need a piece of software that lets you use File Transfer Protocol (FTP).

Most FTP clients work the same way and (once you've inputted your login name and password) present you with two window panes, one displaying the contents of your own hard disk, the other showing the files on the remote computer (the Web server). Files are simply dragged and dropped from one window to the other.

Don't go mad and post up all your half-baked, experimental pages as you might end up running out of server space or find these pages being added to search engine databases.

It's usually easiest - and prudent - to keep a mirror image of the site on your local hard drive and maintain a second or third back up too, just in case. Sooner or later you're bound to overwrite the wrong file or suffer some other kind of calamity - it happens to everyone!