The purpose of system backup and disaster recovery planning is to ensure data integrity and availability during unforeseen events. System backup involves creating copies of data to prevent loss caused by hardware failures, cyber-attacks, or natural disasters. Meanwhile, disaster recovery planning outlines strategies for restoring services and functioning after a significant disruption. Together, they provide organizations with the means to protect critical information, minimize downtime, and maintain business continuity, ultimately safeguarding against financial loss and reputation damage.