hi
just blocked usb devices by GPO(enable All Removable Storage classes: Deny all access.), and works perfectly for USB mass storage devices.
but for MTP mode devices, when i plug in a new MTP device, it can be access normally. then if i refresh the policy by "gpupdate /force", unplug and re-plug in the device, it got blocked.
my question is, how can i block MTP mode device even it's the first time plug into the machine?
thank you