Question How to exclude a customer's locally stored Plesk backup from the full Plesk server backup?

[Bitpalast]

On some hosts we have customers who create their own backup sets with Plesk and store them locally into the server storage space. It seems that all these local backups are backed up again in the full server backup that the administrator has configured. Through the years we never ran into a situation where this was necessary, and it is more or less a waste of time, cpu power and backup storage space to store all the website data plus all the local backups.

Is there a parameter, maybe undocumented, by which the backup service can be instructed to omit all locally stored backups from full server backups?