I have disabled removable_disk_storage but I 'd like to disable all devices that could be connect by usb port.

is it possible to this by GPO? or must I create a simple application that modify the registry?

In fact I have done this test after disable removable_disk_storage:
I have inserted the usb bluetooth into my pc ... and it's works by the drivers of windows ( that I haven't installed) !!

is it possible to disable bluetooth usb device?

Please can someone help me?