A backup is a copy of the data stored on a device. It’s useful for restoring data if your device crashes or continuing work if your device is lost or stolen.
When you backup your data, you create a copy of some or all of the files on your device and store them in a separate location (which is usually either on a flash drive, removable hard drive, or in the cloud). Some kinds of backups even store your device configurations. Backup and recovery software can automate the backup process by performing backups based on a set schedule.
To restore data from a backup, you use either recovery software (to restore full backups of a device’s data and configurations) or manually replace files with copies from the backup (usually to restore lost or corrupted files).