Backup

A copy of files and programs made to facilitate recovery, if necessary. (NIST SOURCE: SP 800-34; CNSSI-4009)

Copying data to ensure its availability in the case of computer failure or loss. (www.getsafeonline.org/jargon-buster)

Backup falls under the data & recovery cells in the Sounil Yu Matrix.

(Also see Backup Site, Backup Facility [As per "Hot", "Cold", & Warm Site])

https://en.wikipedia.org/wiki/Backup