Local storage directory
Use this dialog box to define where on the local disk shadowed data is stored.
By default, DeviceLock Service uses the %SystemRoot%\SHADOW directory to store shadowed data on the local computer. %SystemRoot% is a standard environment variable that expands to a path to the Windows root folder (e.g. C:\Windows). You can specify any other directory on any locally accessible hard disk.
DeviceLock Service protects this directory so regular users can't access files inside it.
Make sure that there is enough space to store the data (if the user copies 1GB to the flash drive, then you need approximately 2GB available in local storage).