The main purpose of a data backup system is to ensure that critical data is preserved and recoverable in case of loss, corruption, or disaster. Backup systems can automate data copy processes, storing data in multiple locations such as on-site servers or cloud environments. This redundancy mitigates the risks associated with hardware failure, accidental deletions, or cyberattacks. By implementing robust backup strategies, organizations can maintain business continuity, safeguard information, and comply with relevant data protection regulations.