Many organizations need to retain multiple petabytes of data to satisfy business and regulatory compliance requirements. Among these organizations, many choose on-premises magnetic tape libraries or offsite tape archival services, which are expensive and onerous to maintain. In this session, we look closely at Amazon Simple Storage Service (Amazon S3) Glacier Deep Archive, which enables customers with large datasets to eliminate the cost and management of tape infrastructure while ensuring that data is preserved for future use and analysis. Amazon S3 Glacier Deep Archive is the lowest-cost storage class for Amazon S3, and we examine how it supports long-term retention and digital preservation of data that is seldom, if ever, accessed.