Depending on your service contract, Files can be transferred to the web server via File Cabinet utility in the Control Center, or File Transport Protocol (FTP). If you have an internet account and need FTP software, you can download an open source FTP program call FileZilla from http://sourceforge.net/projects/filezilla.
Uploading files can also be done efficiently and easily using a site creation/publishing tool such as Macromedia Dreamweaver or Microsoft Frontpage.