Question

a ___ is a copy of one or more files (or entire storage devices) that is made in case the originals become lost or damaged.
path
file system
firewall
backup

Explanation:

A backup is specifically a copy of files or storage devices made for data - recovery purposes in case of loss or damage. A path is a location reference, a file system organizes data on storage, and a firewall protects network security.

Answer:

D. backup