Backing up Your Web Files
To begin with you can make a master copy by going to your cPanel (to access your cPanel see this article) or (see this article) and creating a backup and downloading it or you can choose to download one of the copies the server has on file.
See video below
You can also use FTP to get your files please see this article to learn about using FTP.
You can separately backup and download your Database files by following the video below.
You can also get separate files though your cPanel file manager see video below.
