add usb granular importcontent support
add usb granular importcontent support

indirectlylit/kolibri,learningequality/kolibri,learningequality/kolibri,christianmemije/kolibri,learningequality/kolibri,lyw07/kolibri,mrpau/kolibri,DXCanas/kolibri,jonboiser/kolibri,jonboiser/kolibri,DXCanas/kolibri,indirectlylit/kolibri,lyw07/kolibri,benjaoming/kolibri,indirectlylit/kolibri,mrpau/kolibri,jonboiser/kolibri,christianmemije/kolibri,jonboiser/kolibri,mrpau/kolibri,christianmemije/kolibri,benjaoming/kolibri,lyw07/kolibri,DXCanas/kolibri,christianmemije/kolibri,lyw07/kolibri,DXCanas/kolibri,mrpau/kolibri,benjaoming/kolibri,indirectlylit/kolibri,benjaoming/kolibri,learningequality/kolibri