What is the 3-2-1 Archive and Data Protection Best Practice?

The 3-2-1 Archive and Data Protection Best Practice was formulated from decades of experience with many different archive technologies, many of which do not exist today. Using proprietary technology or formats can lead to expensive migration programs when (not if) they become obsolete. Storing three copies of all archive data to two different technologies, and storing one copy offsite (preferably offline) offers a strong platform to ensure all eventualities are protected against – such as; fire, flood, earthquake, ransomware, virus, malicious action, obsolescence, etc.