>>Do you know of any freeware that would let block/unblock access to usb drives?
>
>You only need to change a registry setting, http://www.redmondpie.com/disable-usb-storage-in-windows-8-7-how-to-guide/
>
>In Tools->Task Pane->Solution Samples you find out how to work with the registry.

Thanks Tore. I found similar info while googling. The thing is that I'd prefer a software freeware way to do it.