EFS data transfer

Question

Dear colleagues, 
Is there and data transfer costs when I'm sending data to EFS? 
Let's say I have a margate in VPS task. It has public and private IP. If I'll write and then read 1GB of data from Fargate task to EFS is there will be some hidden cost other than declared [here](https://aws.amazon.com/efs/pricing/)?

Accepted Answer

The key wording is [here](https://aws.amazon.com/ec2/pricing/on-demand/#Data_Transfer_within_the_same_AWS_Region) - Even though not explicitly mentioned transfer between EFS and Fargate will use the VPC ENI's. So within the same availability zone the transfer is free. You should create a mount target in each AZ your fargate task might run in so you can be sure your task sends traffic within the same AZ. If the transfer goes cross AZ there is a charge so best to avoid

EFS data transfer

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