System-level backups cannot be configured or executed from within Moodle. Instead, they will have to be set up on system (shell) level. If your system is hosted externally, there is a possibility that you will not have access to the system level, which will prevent you from performing this type of backup. That means it’s time to change to another host!
Moodle distinguishes between Moodle software and the data that is stored in it. The advantage of this separation becomes apparent when creating backups: A software backup is only required when an update has been installed, whereas the data has to be backed up more frequently.