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.