A backup system is a process or technology used to create and maintain copies of data or files in case the original data is lost, corrupted, or accidentally deleted. It is a crucial component of data protection and disaster recovery strategies. Backup systems ensure that important information can be restored and accessed in the event of a system failure, natural disaster, cyberattack, or human error. These systems typically involve making duplicate copies of data and storing them in separate locations or on different storage devices to minimize the risk of data loss.