EFS Back up Cost

Hello.

I tried to get an estimate using the Pricing Calculator.
I think it will cost around 3000 USD for the first month.
https://calculator.aws/#/estimate?id=d4b899235b1f0bdddaf719571c95396bfa8d7ef2

After that, you will be charged for backups taken incrementally, so it should be cheaper.
https://docs.aws.amazon.com/efs/latest/ug/awsbackup.html

AWS Backup performs incremental backups of EFS file systems. During the initial backup, a copy of the entire file system is made. During subsequent backups of that file system, only files and directories that have been changed, added, or removed are copied. With each incremental backup, AWS Backup retains the necessary reference data to allow a full restore. This approach minimizes the time required to complete the backup and saves on storage costs by not duplicating data.