In the realm of information technology, a backup refers to the process of creating a copy of data from a computer or device and storing it in a separate location. This practice is essential for data protection, allowing data recovery in the event of hardware failure, accidental deletion, or other forms of data loss. Backups can be made on physical devices like external hard drives or using cloud-based services. Regular backups are a critical part of data management and security strategies, ensuring that important information can be retrieved and restored to maintain business continuity or personal data integrity.