Copy S3 bucket to another AWS account

I recently had to copy an S3 bucket from one account to another. Here”s the steps required.

In the AWS account you want to copy from, allow the account you want to copy to access.

    "Version": "2008-10-17",
    "Statement": [
            "Effect": "Allow",
            "Sid": "AccountBAccess1",
            "Principal": {
                "AWS": "XXXXXXXX"
            "Action": "s3:*",
            "Resource": "arn:aws:s3:::BUCKET_NAME/*"

Next configure the aws-cli (brew install awscli) to use the new AWS account credentials (you”ll need to create a user and give them full S3 access).

Now you can use s3 sync to sync across aws accounts.

aws s3 sync s3://oldbucket s3://new-bucket