What I mean to say is if I backup ROM A, then I make some changes updates etc, then I backup that ROM= A.1. Does A.1 have the backup image of A in it somewhere? Extrapolated- A=A A.1=A+A.1 A.2=A+A.1+A.2 I imagine it does I am just wondering if it can be eliminated/manipulated/utilized? Or does it only save the changes? Thanks in advance for any input.