Please login to your control panel and create a full backup. This may take a few minutes to generate a tar.gz file that will have all your site, email, database and settings.
Once the backup is created, you can download it using ftp from your account home directory.
You can also download partial backups of your home directory or databases from the control panel.
Please see the PARTICULAR How-To backup instructions for whatever hosting control panel you are on (cPanel, Plesk, or DirectAdmin) from the User Guides for each control panel -- linked to from our sales sites "Contact Us" and "Support" pages.