How to: Storage Durability, Availability, and Price
As an illustration of comparative features and price, the table below gives S3 Standard, RRS, IA, in comparison with [Glacier](#glacier), [EBS](#ebs), [EFS](#efs), and EC2 d2.xlarge instance store using **Virginia region** as of **Sept 2017**.

|                 | Durability (per year)  | Availability “designed” | Availability SLA | Storage (per TB per month)                                                                                               | GET or retrieve (per million) | Write or archive (per million) |
|-----------------|------------------------|-------------------------|------------------|--------------------------------------------------------------------------------------------------------------------------|-------------------------------|--------------------------------|
| **Glacier**     | Eleven 9s              | Sloooow                 | –                | $4                                                                                                                       | $50                           | $50                            |
| **S3 IA**       | Eleven 9s              | 99.9%                   | **99%**          | $12.50                                                                                                                   | $1                            | $10                            |
| ~~**S3 RRS**~~      | ~~**99.99%**~~             | ~~99.99%~~                  | ~~99.9%~~            | ~~$24 (first TB)~~                                                                                                                      | ~~$0.40~~                         | ~~$5~~                             |
| **S3 Standard** | Eleven 9s              | 99.99%                  | 99.9%            | $23                                                                                                                     | $0.40                         | $5                             |
| **EBS**         | **99.8%**              | Unstated                | 99.99%           | $25/$45/**$100**/$125+ ([sc1/st1/**gp2**/io1](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSVolumeTypes.html)\) |                               |                                |
| **EFS**         | “High”                 | “High”                  | –                | $300                                                                                                                     |                               |                                |
| **EC2 d2.xlarge instance store**  | Unstated | Unstated                | –                | $25.44                                                                                                                   | $0                            | $0                             |

Especially notable items are in **boldface**. Sources: [S3 pricing](https://aws.amazon.com/s3/pricing/), [S3 SLA](https://aws.amazon.com/s3/sla/), [S3 FAQ](https://aws.amazon.com/s3/faqs/), [RRS info](https://aws.amazon.com/s3/reduced-redundancy/) (note that this is considered deprecated), [Glacier pricing](https://aws.amazon.com/glacier/pricing/), [EBS availability and durability](https://aws.amazon.com/ebs/details/#Amazon_EBS_Availability_and_Durability), [EBS pricing](https://aws.amazon.com/ebs/pricing/), [EFS pricing](https://aws.amazon.com/efs/pricing/), [EC2 SLA](https://aws.amazon.com/ec2/sla/)

EC2
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