How to change the location for backup files in Plesk for Windows Server?
Connect to a Plesk server via RDP.
Start Plesk Reconfigurator at Windows Start > All Programs > Plesk.
In Plesk Reconfigurator, select Change Plesk Backup Data location.
Specify a new location for backup files and click Next. All existing backup data will be transferred to the new location as well. During this operation Plesk will be stopped.
Note: The Plesk backup data folder cannot be created inside a user's profile folder