You can backup your database using the PHPMyAdmin feature in your control panel.
- In PHPMyAdmin, first select the database you want to backup and select "Export" tab on the right screen.
- Next, choose the tables you wish to backup (or "Select All" for all tables). Scroll down and tick "Save File As..." and click the "Go" button.
- Save the database file that begins to download, on your local computer.