Backup rotation is the planned schedule for moving data copies between primary storage and backup media, such as disk sets, removable drives, or tape. Instead of keeping one backup forever, rotation cycles copies through different media, locations, or retention periods so older versions are available when needed and storage does not fill up uncontrolled.
In cyber security, rotation matters because it improves resilience against ransomware, accidental deletion, hardware failure, and corruption. A well-designed rotation can keep some backups offline or disconnected, reducing the chance that malware reaches every copy. It also supports recovery from older, clean versions when the newest data is damaged. Defenders use rotation together with retention rules, encryption, and restore testing; attackers often try to delete or encrypt backup sets first, which is why a disciplined rotation process is a core part of recovery planning.