You can save money on storage costs for blob data with Azure Storage reserved capacity. Azure Storage reserved capacity offers you a discount on capacity for block blobs and for Azure Data Lake Storage Gen2 data in standard storage accounts when you commit to a reservation for either one year or three years. A reservation provides a fixed amount of storage capacity for the term of the reservation.

Azure Storage reserved capacity can significantly reduce your capacity costs for block blobs and Azure Data Lake Storage Gen2 data. The cost savings achieved depend on the duration of your reservation, the total capacity you choose to reserve, and the access tier and type of redundancy that you've chosen for your storage account. Reserved capacity provides a billing discount and doesn't affect the state of your Azure Storage resources.