Optionally, data from {HEAD ~ the primary operating system} can be exported to {TAIL ~ the secondary memory device} as well 
Optionally , data from { HEAD ~ the primary operating system } can be exported to { TAIL ~ the secondary memory device } as well
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH