To create a backup of your Typo3 website, you will need to do two things:
Backup your website files. You can do that by downloading copy of your website files to your local computer using FTP. You can find our FTP video tutorials here:
https://tmdhosting.com/tutorials/video/ftp.html
Backup your website database. You can easily download a backup of your MySQL database using a database management tool like phpMyAdmin. To export MySQL database using phpMyAdmin you can follow our step by step video tutorial here:
https://www.tmdhosting.com/tutorials/video/phpmyadmin/phpma-export.html