I have a 16" MBP coming and want to backup the stuff on my current 15" MBP. I want to initially set up the 16" with nothing from the old system installed because about 50% of the stuff I have on my 15" MBP I hardly ever use. But, there may come someday when I want that dusty old file. TM seems more incremental than full backup. So the question is what is best way to do this type of backup all at once, aka a full backup on my 15"?