In IT, a backup, or the process of backing up, refers to the copying and archiving of computer data so it may be used to restore the original after a data loss event.
Backups have two distinct purposes:
The primary purpose is to recover data after its loss, be it by data deletion or corruption. Data loss can be a common experience of computer users.
The secondary purpose of backups is to recover data from an earlier time, according to a user-defined data retention policy, typically configured within a backup application for how long copies of data are required.