Thank you very much for your responses. I have been too busy with BE atm.
@Colin
I am guessing that they backup to B2D then sync/ or copy the whole thing to another external HD so that they can swap and get one HD off site. With upgrade to 12, I wish they could do that too because I am more familiar with the latest version than old one.
@Kiran
Your explanation is greatly appreciated. Full, Differential, Incremental, they are the same?
Admin's guide from Help menu is the first place I went to...unfortunately they did not install it along with BE installation.
I really need some document to learn / read. Thanks a lot in advance.
Regards