Backup testing is the repeated process of checking that copied data can be restored successfully and used when needed. A backup that has never been restored is only an assumption: files may be incomplete, corrupted, inaccessible, or missing the information required to rebuild a system.
In cyber security, recovery tests help organizations prepare for ransomware, accidental deletion, hardware failure, and other disruptions. Tests can verify individual files, databases, or full systems, and should confirm that recovery meets business needs for timing and data loss. In cloud environments, customers still need to configure and verify their backups even when a provider operates the underlying service. Regularly documented tests can reveal gaps before an emergency and support reliable business continuity.