[Paul M]

Originally Posted by Davidinh

In a case for new version of mysql you should add var $MYSQLI; (after var $MYSQL) in mysqlbackup.php then change var $DTYPE = 'mysqli' ;

This isnt necessary, and wont do anything.
In fact, if you set $DTYPE = 'mysqli' you will end up using the php backup process.
You seem to be confusing variable names with actual database systems, the fact you are now using MySQLi doesnt affect the variable names.

For the backup path, you should never use a website location (i.e. one thats accessible via a url) such as the two examples you gave, otherwise anyone can potentially just download your backup files.