Backup refers to the process of creating copies of data to protect it from loss or damage. This is essential for individuals and organizations alike, as it ensures that important information can be restored in case of hardware failure, accidental deletion, or cyberattacks. Common methods include external hard drives, cloud storage, and backup software. In today's digital age, cloud backup has gained popularity due to its convenience and accessibility. Services like Google Drive and Dropbox allow users to store their data securely online, making it easy to retrieve files from anywhere. Regular backups are crucial for maintaining data integrity and security.