S3 versioning: only copy files if they are new or changed

I’m running a cron job in a EC2 instance that backups a database dump and a folder (with files and subfolders) in a S3 bucket.

I only want to backup new and modified files in order to save costs. Is this possible?

I’m currently using aws cp, maybe there is an argument or another command?

thanks

>Solution :

Use aws s3 sync instead of aws s3 cp and it will do this automatically for you.