Backup
A backup is a copy of data created so that information can be restored after an error, data loss or a system failure. Depending on requirements, it may include individual files, configurations or complete system states, such as the contents of a database. Backups are a core part of data backup and should be performed regularly in a traceable manner. A backup is often created before major system changes, such as an update or adjustments during system initialisation, so that a defined starting state is available if problems occur.