>To be fair, it's 300k by 300k (not 3mill by 3mill), so: > >R> (300000 * 300000 * 8) / 2^30 >[1] 670.5523 > >So, I guess 0.67 terabytes ... no problemo ;-) > >-steve I'm getting the picture now. Thanks for the additional example. And Doug, sorry I still missed your earlier point.