Hi,
We have standard group policy for blocking USB or external storage devices. Now as per the current scenarios some of phones and devices are being accessible from Desktop/laptop and these devices are being considered as WPD( Windows Portable Devices ). These PWDs can be straight away blocked through GROs which is available on 2008/R2 and running fine for windows 7 systems but having problem in windows XP systems. As per my understanding PortableDeviceApi.dll doesn't exist in XP. Kindly let me know if you have any mechanism or script through which PWD devices can be restricted.