High network traffic consumption when doing backup to AWS S3 Bucket

Symptoms

Backup creation to AWS S3 bucket increases network traffic consumption considerably when Validate backups via checksum option is enabled in Tools & Settings > Backup Manager > Remote Storage Settings > Amazon S3 Backup after updating Plesk to version 18.0.68

Cause

This was identified as a bug with ID PPPM-14912

Resolution

Fix was included in Plesk 18.0.70.
Update Plesk to the latest build

Additionally, It is now possible to configure the backups validation period via panel.ini file. To do that add the following option into panel.ini:

[pmm]
backupsValidationPeriod = 0

Note: backupsValidationPeriod is in days, default value is 7, 0 means no validation.