Use Cloud Backup , which creates incremental, cloud-provider-native snapshots that do not impact performance.
Export Your MongoDB Snapshots With The Atlas Administration API mongodb atlas download backup
MongoDB Atlas offers different backup strategies depending on your cluster tier: Use Cloud Backup
Standard Atlas backups are not available for these tiers. You must manually use the Command Line Database Tools to create and download backups. How to Download Backups via the Atlas UI which creates incremental