Amazon EFS Standard-Infrequent Access

Save up to 91% on file storage

Maximizing operational efficiency and reducing total cost of ownership are common drivers for moving business applications to the cloud.

Amazon Elastic File System (Amazon EFS) provides a simple, serverless, set-and-forget elastic file system for use with Amazon Web Services Cloud services and on-premises resources. Amazon EFS Standard-Infrequent Access (EFS Standard-IA) and Amazon EFS One Zone-Infrequent Access (EFS One Zone-IA) are storage classes that provide price/performance that is cost-optimized for files not accessed every day, with storage prices up to 91% lower compared to Amazon EFS Standard (EFS Standard) and Amazon EFS One Zone respectively. The EFS One Zone-IA storage class costs only ¥0.107/GB-month*, and EFS Standard-IA costs only ¥0.2/GB-month**.

Using the industry accepted estimate that 20% of data is actively used and 80% is infrequently accessed, you can store your files on Amazon EFS at an effective price of ¥0.3136/GB-month (20% * ¥1.14/GB-month for files stored on EFS One Zone + 80% * ¥0.107/GB-month for files stored on EFS One Zone-IA = ¥0.3136/GB-month)*, or an effective price of ¥0.589/GB-month (20% * ¥2.145/GB-month for files stored on regional EFS Standard + 80% * ¥0.2/GB-month for files stored on EFS Standard-IA = ¥0.589/GB-month)**.

To get started, simply enable Amazon EFS Lifecycle Management for your file system by selecting a lifecycle policy that matches your needs. Amazon EFS will automatically move your files to the lower cost regional EFS Standard-IA or Amazon EFS One Zone-IA storage class based on the last time they were accessed. Amazon EFS transparently serves files from both frequently accessed and infrequent access storage classes from a common file system namespace, so you don't have to worry about which of your files are actively used and which are infrequently accessed.

*pricing in Amazon Web Services China (Ningxia) region, operated by NWCD, assumes 80% of your storage in EFS One Zone-IA
**pricing in Amazon Web Services China (Ningxia) region, operated by NWCD, assumes 80% of your storage in EFS Standard-IA

How it works

  1. Create file system
  2. Choose Lifecycle Management file access policy (7, 14, 30, 60, or 90 days) using the Amazon Web Services CLI, API, or Amazon EFS Management Console
  3. Files not accessed according to the age-off policy are moved to regional EFS Standard-IA or EFS One Zone-IA storage class, depending on whether your file system uses regional or One Zone storage classes.

Use Cases for Infrequent Access Storage


Backup & Recovery

EFS Standard-IA and EFS One Zone-IA cost effectively store file data, with industry-leading availability, security and durability enabling you to meet regulatory retention and compliance needs so your backups are protected and available when needed.



Managing massive volumes of big data analytics can be costly and complex for workloads like genomics and geospatial applications. EFS Standard-IA and EFS One Zone-IA storage classes cost-effectively store large amounts of data while providing the same throughput used to scale applications with files stored in EFS Standard and EFS One Zone storage classes.


Document Management

Many reporting systems for business applications rely on accessible shared file storage in support of business functions. With EFS Standard-IA and EFS One Zone-IA, you can easily and cost-effectively store and access their shared file system, eliminating the need to manage data to control costs.

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