Amazon S3 Glacier is an online file storage web service that provides storage for data archiving and backup. Glacier is part of the Amazon Web Services suite of cloud computing services, and is designed for long-term storage of data that is infrequently accessed and for which retrieval latency times of 3 to 5 hours are acceptable. Storage costs are a consistent $0.004 per gigabyte per month, which is substantially cheaper than the Simple Storage Service (S3) Standard tier. Amazon hopes this service will move businesses from on-premises tape backup drives to cloud-based backup storage.
https://en.wikipedia.org/wiki/Amazon_S3_Glacier