AWS Backup launches a low-cost warm storage tier for Amazon S3 backups

Posted on: Nov 18, 2025

AWS Backup introduced a low-cost warm storage tier for Amazon S3 backup data that can reduce costs by up to 30%. After S3 backup data resides in a vault for 60 days (or longer based on your settings), you can move it to the new low-cost warm storage tier. The low-cost tier provides the same performance and features as the warm storage tier, including ransomware protection, recovery, and auditing.

Use the new low-cost warm storage tier to reduce storage costs for business, compliance or regulatory data you must retain long-term. With this launch, you can now configure automatic tiering for all S3 backups for all vaults in an account, a specific vault, or a bucket within a vault by setting an age threshold of 60 days or more. When you enable tiering, existing backup data beyond the threshold automatically moves to the low-cost warm tier, delivering immediate cost savings with no action required and no performance impact.

This low-cost storage tier is available in all AWS Regions where AWS Backup for Amazon S3 is available. There is a one-time transition fee when data moves to the low-cost warm tier. For additional pricing information, visit the AWS Backup pricing page.

To learn more about AWS Backup for Amazon S3, visit the product page and technical documentation. To get started, visit the AWS Backup console