It is recommended that whenever new files are added or a task is configured for the students, a warning will be added in the "News" Forum of the course. In this way students will receive notification.
There is also another option in which the teacher of a course in the new Virtual Classroom can configure a rule in their courses because the system sent a notification when the contents of a folder were updated. Keep in mind that:
This rule sends notification when the teacher adds, deletes files that are inside a folder in the Moodle course. Because the student receives notification it is necessary to subscribe to the rule.