Backup systems are essential tools used to create copies of data to prevent loss in case of hardware failure, accidental deletion, or cyberattacks. These systems can be hardware-based, like external hard drives, or software-based, such as cloud storage services like Google Drive or Dropbox. Regular backups ensure that important files and information can be restored quickly and efficiently. There are different types of backup methods, including full, incremental, and differential backups. A full backup copies all data, while incremental backups only save changes made since the last backup. Differential backups save changes since the last full backup. Choosing the right method depends on the specific needs and resources of the user or organization.