Which of the following refers to a location away from the computer center where document copies and backup media are kept?

Off-site storage refers to a secure location, physically distant from the primary computer center, where backup copies of data, documents, and media are kept. This strategy protects against data loss due to disasters affecting the main site.

Network Attached Storage (NAS) is a file-level data storage server connected to a computer network, providing data access to a heterogeneous group of clients, but it can be on-site or off-site, and isn't solely defined as an off-site location for backups.

A Storage Area Network (SAN) is a dedicated high-speed network that provides access to consolidated, block-level data storage, typically located within the primary data center.

On-site storage refers to backup media or data kept at the same physical location as the primary computer systems, which does not protect against site-wide disasters.