Explanation: An Amazon Glacier vault is a container in which you can organize and manage your archives. You store data in Amazon Glacier as an archive. Each archive is assigned a unique archive ID that can later be used to retrieve the data. An archive can represent a single file or you may choose to combine several files to be uploaded as a single archive. You upload archives into vaults. Vaults are collections of archives that you use to organize your data. Reference: http://aws.amazon.com/glacier/faqs/#How_do_vaults_work