To create a backup of your Elgg website, you will need to do 2 things:
Backup your website files
Backup your website database
To backup your website files, simply download them via FTP. You can find our FTP video tutorials at:
https://tmdhosting.com/tutorials/video/ftp.html
To backup your website database, simply export it using a database management tool like phpMyAdmin. You can find our video tutorial on how to export a database via phpMyAdmin here:
https://www.tmdhosting.com/tutorials/video/phpmyadmin/phpma-export.html