[SOLVED] Cost of copying files between Amazon S3 buckets in different Accounts

Cost of copying files between Amazon S3 buckets in different Accounts

I want to copy the S3 files in my account to a different AWS account.

How do I copy without a data transfer fee?

Example command:

aws s3 cp s3://sourceBucket/file s3://targetBucket/

Does it transfer files over the Internet or does AWS transfer over the internal network?

Data size: 71TB

Solution

If the source and destination buckets are in the same Region, then there is no Data Transfer cost.

A few tips when copying objects between buckets owned by different Accounts:

You will need to use a set of credentials that has both GetObject permission on the source bucket and PutObject permission on the destination bucket
If you are using credentials from the source account, then make sure you use --acl bucket-owner-full-control otherwise the destination account will not be able to access/read/delete the object. This is why it is often better to use credentials from the destination account to copy the object.