Data backup is the process of creating copies of data to protect it from loss or corruption. This ensures that important information can be restored in case of hardware failure, accidental deletion, or cyberattacks. Regular backups are essential for both individuals and organizations to maintain data integrity and availability. There are various methods for data backup, including cloud storage, external hard drives, and network-attached storage. Each method has its advantages and disadvantages, but the key is to choose a strategy that fits your needs and to perform backups regularly to minimize the risk of data loss.