Amazon Elastic File System (Amazon EFS) is a simple, serverless, set-and-forget, elastic file system. There is no minimum fee or setup charge. You pay only for the storage you use, for read and write access to data stored in Infrequent Access storage classes, and for any provisioned throughput.

Amazon EFS offers four storage classes: two standard storage classes, including Amazon EFS Standard and Amazon EFS Standard-Infrequent Access (EFS Standard-IA), and two One Zone storage classes, including Amazon EFS One Zone and Amazon EFS One Zone-Infrequent Access (EFS One Zone-IA).

For more information visit EFS Infrequent Access.

Effective storage pricing for file systems using Lifecycle Management (select regions)

Region Effective storage price ($/GB-Mo) - One Zone* Effective storage price ($/GB-Mo) - Standard**
US East (N. Virginia) $0.043 $0.08
US West (Oregon) $0.043 $0.08
Africa (Cape Town) $0.054 $0.10
Asia Pacific (Seoul) $0.047 $0.09
Canada (Central) $0.047 $0.09
Europe (Ireland) $0.046 $0.09
AWS GovCloud (US-East) $0.056 $0.11


*Assumes 80% of data is infrequently accessed and stored in One Zone-IA

**Assumes 80% of data is infrequently accessed and stored in Standard-IA

You can calculate the effective storage price for your region using the example below:

How we calculate Effective Storage Price

File systems using EFS Infrequent Access to transfer infrequently accessed files to IA storage (Standard-IA or One Zone-IA) have a lower effective storage cost per GB-month compared to file systems that do not use EFS Infrequent Access. Save up to 92 percent on storage costs for infrequently accessed files by enabling Lifecycle Management for your file system. Industry research and customer analysis show that on average, 20 percent of files are actively used and 80 percent are infrequently accessed. Calculate your effective storage cost per GB-month using the example below (based on One Zone pricing in US East (N. Virginia).

Required inputs:

1. Total Monthly Storage Required (GB). Ex. 500 GB

2. Percentage of files that are frequently accessed. Ex. 20%

Effective storage cost = (Storage cost for frequently accessed data + Storage cost for infrequently accessed data)/Total storage

Example: Effective storage cost = (500 * 20%) * ($0.16) + (500 * 80%) * ($0.0133) / 500 =
= ($16 + $5.32)/500
= $0.043/GB-Month

Using this estimate, you can store your files on Amazon EFS at an effective price of $0.043/GB-month1 when using EFS One Zone-IA, and $0.08/GB-month1 when using EFS Standard-IA. Detailed pricing examples follow.

1pricing in the US East (N. Virginia) region

Total Cost of Ownership
Amazon EFS offers price advantages over self-managed cloud alternatives. For more information on how much you can save, see the Amazon EFS Total Cost of Ownership (TCO) example here.

AWS Free Tier

As part of the AWS Free Tier, you can get started with Amazon EFS for free. Upon sign-up, new AWS customers receive 5 GB of Amazon EFS storage in the EFS Standard storage class for 12 months. The AWS Free Tier is not applicable to files stored in the EFS One Zone storage class.

Your usage for the free tier is calculated each month across all AWS Regions except the AWS GovCloud Region and automatically applied to your bill; unused monthly usage will not roll over. Restrictions apply; see offer terms for more details.

Pricing table

Within your first 12 months on AWS, you can use up to 5 GB/month on the EFS Standard storage class for free.

Pricing examples

The storage amount billed in a month is based on the average storage space used throughout the month. Your storage usage is measured in "GB-Month," which are added up at the end of the month to generate your monthly charges. These pricing examples assume 20 percent of your data is stored in a storage class meant for frequently accessed data (for example, EFS Standard or EFS One Zone) and 80 percent is stored in an infrequent access storage class (for example, EFS Standard-IA or EFS One Zone-IA), following industry-accepted estimates.

The throughput amount billed in a month is based on the average throughput provisioned in excess of what your EFS Standard storage allows for the month. Your throughput is measured in "MB/s-Month," which are added up at the end of the month to generate your monthly charges.

Example 1:

Assume your file system is located in the US East (N. Virginia) region, uses 100 GB of EFS One Zone storage, and uses 400 GB of EFS One Zone-Infrequent Access storage for the entirety of a 31-day month. At the end of the month, you would have the following usage in GB-Hours:

Total EFS One Zone usage (GB-Hours): 100 GB x 31 days x (24 hours / day) = 74,400 GB-Hours
Total EFS One Zone-IA usage (GB-Hours): 400 GB x 31 days x (24 hours / day) = 297,600 GB-Hours

We add up GB-Hours and convert to GB-Month to calculate monthly charges:

Total EFS One Zone storage charge: 74,400 GB-Hours x (1 month / 744 hours) x $0.16/GB-month = $16
Total EFS One Zone-IA storage charge: 297,600 GB-Hours x (1 month / 744 hours) x $0.0133 /GB-month = $5.32

Total Monthly Storage Charge: $16 + $5.32 = $21.32 or $0.043/GB-month

Example 2:

Assume your file system is located in the US East (N. Virginia) region, uses 100 GB of EFS Standard storage, and uses 400 GB of EFS Standard-Infrequent Access storage for the entirety of a 31-day month. At the end of the month, you would have the following usage in GB-Hours:

Total EFS Standard usage (GB-Hours): 100 GB x 31 days x (24 hours / day) = 74,400 GB-Hours
Total EFS Standard-IA usage (GB-Hours): 400 GB x 31 days x (24 hours / day) = 297,600 GB-Hours

We add up GB-Hours and convert to GB-Month to calculate monthly charges:

Total EFS Standard storage charge: 74,400 GB-Hours x (1 month / 744 hours) x $0.30/GB-month = $30.00
Total EFS Standard-IA storage charge: 297,600 GB-Hours x (1 month / 744 hours) x $0.025/GB-month = $10.00

Total Monthly Storage Charge: $30.00 + $10.00 = $40.00 or $.08/GB-month

Example 3:

This example compares two scenarios that assume you store 100 GB on EFS Standard and 400 GB on EFS Standard-IA in the US East (N. Virginia) region. In the first scenario, you select the default Bursting Throughput mode, and in the second scenario, you configure 10 MB/s of Provisioned Throughput. Note that you would be entitled to a baseline throughput of 5 MB/s in both scenarios because you are storing 100 GB of data on Amazon EFS Standard.

Default Bursting Throughput: 100 GB of data in EFS Standard and 400 GB of data in EFS Standard-IA, using the default Bursting Throughput mode

Total monthly storage charge (as above): $40.00

Provisioned Throughput: 100 GB of data in EFS Standard and 400 GB of data in EFS Standard-IA, with 10 MB/s of Provisioned Throughput

Total monthly storage charge (see above calculations): $40.00
Default throughput (MB/s-Hours) = (74,400 GB-Hours / 20 GB-Hours) * 1 MB/s-Hour = 3,720 MB/s-Hours
Total provisioned throughput (MB/s-Hours) = 10 MB/s x 31 x 24 hours/day = 7,440 MB/s-Hours
Total billable provisioned throughput (MB/s-Hours) = 7,440 MB/s-Hours – 3,720 MB/s-Hours =3,720 MB/s-Hours
Total billable provisioned throughput (MB/s-Month) = 3,720 MB/s-Hours / (31 days/month x 24 hours/day) = 5 MB/s-Month

Total monthly Provisioned Throughput charge = 5 MB/s-Month x 6.00 = $30.00

Total monthly charge = Total monthly storage charge + Total monthly throughput charge =$40.00 + $30.00 = $70.00

Example 4:

The following example reflects a scenario where your file access patterns change over time, and includes each of EFS Standard-IA's pricing dimensions. The example assumes that the two EFS Lifecycle policies to move files between EFS Standard and EFS Standard-IA are set.

Assume your file system is located in the US East (N. Virginia) region. At the beginning of a 31-day month, your file system stores 1 TB of files on EFS Standard. On the fifteenth day of the month, EFS Lifecycle Management moves 80 percent of your files to the EFS Standard-IA storage class after 14 days of having not been accessed. Once your infrequently accessed files move to EFS Standard-IA, 10 different clients read them all in full once per month. The 800 GB of files read are moved to EFS Standard storage class.

First, we calculate the pro-rated storage usage:

1 TB of EFS Standard storage for 14 days (GB-Hours): 1,000 GB x 14 days x (24 hours / day) = 336,000 GB-Hours
200 GB of EFS Standard storage for 17 days (GB-Hours): 200 GB x 17 days x (24 hours / day) = 81,600 GB-Hours
Total EFS Standard storage usage (GB-Hours): 336,000 GB-Hours + 81,600 GB-Hours = 417,600 GB-Hours
800 GB of EFS Standard-IA storage for 17 days (GB-Hours): 800 GB x 17 x (24 hours / day) = 326,400 GB-Hours

Next, we convert the storage usage into GB-months and calculate the storage charge:

Total EFS Standard storage charge: 417,600 GB-Hours x (1 month / 744 hours) x $0.30/GB-month = $168.39
Total EFS Standard-IA storage charge: 326,400 GB-Hours x (1 month / 744 hours) x $0.025/GB-month = $10.97
Total EFS storage charge: $168.39 + $10.97 = $179.36

Next, we calculate the access charges for files in EFS Standard-IA:

Writes: 800 GB * $0.01/GB = $8
Lifecycle transition to EFS Standard due to reads to files in EFS Standard-IA: 800 GB * $0.01/GB = $8 (once for 10 clients)
Total EFS Standard-IA access charges: $8 + $8 = $16

Finally, we calculate the total Amazon EFS charge for the month:

Total monthly charges = Total storage charge + Total access charge = $179.36 + $16 = $195.36

Data transfer

Moving your Amazon EFS file data can be managed simply with AWS DataSync.

AWS DataSync

To simplify and accelerate data transfers in and out of Amazon EFS, you can use AWS DataSync, a managed online data transfer service. AWS DataSync’s usage-based pricing is simple and predictable. You pay only for data transferred, at a flat, per-gigabyte rate—no software licenses, contracts, maintenance fees, development cycles, or hardware required.

Learn more »


Backup

Backing up your Amazon EFS file data can be managed simply with AWS Backup.

AWS Backup

To backup your Amazon EFS file data, you can use AWS Backup, a fully managed backup service that makes it easy to centralize and automate the backup of data across AWS services. AWS Backup provides you with a single place to monitor backup activity and to find and restore backups when needed. With AWS Backup, you pay only for the amount of backup storage you use and the amount of backup data you restore in the month. There is no minimum fee and there are no setup charges.

Learn more »


Total Cost of Ownership

Amazon EFS offers price advantages over self-managed cloud alternatives. For more information on how much can be saved, see the Amazon EFS Total Cost of Ownership (TCO) example here.

Additional pricing resources

AWS Pricing Calculator

Easily calculate your monthly costs with AWS

Economics Resource Center

Additional resources for switching to AWS

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