Set the data duplication limit (MB)
Supported on: At least Windows Server 2016, Windows 10 Version 1607
Registry
HKLM
Software\Policies\Microsoft\Windows Defender\Device Control Options
DataDuplicationMaximumQuota text Description
This setting defines the maximum amount of data that can be duplicated for device control. When the limit is reached, files that are copied to removable storage will not be duplicated on the machine.