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