The storage device 1, wherein {TAIL ~ the first expansion connector} and the second expansion drive connector are located in {HEAD ~ a left most column} of the plurality of columns of the matrix configuration 
The storage device 1 , wherein { TAIL ~ the first expansion connector } and the second expansion drive connector are located in { HEAD ~ a left most column } of the plurality of columns of the matrix configuration
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH