A system backup is a process that creates a copy of all the data and settings on a computer or server. This ensures that if the original data is lost due to hardware failure, accidental deletion, or malware attacks, it can be restored from the backup. Backups can include files, applications, and system configurations, making it easier to recover the entire system. There are various methods for performing a system backup, such as using external hard drives, cloud storage services, or dedicated backup software. Regular backups are essential for maintaining data integrity and security, allowing users to recover their information quickly and efficiently when needed.