This may have been asked in a previouse thread, and I tried performing a search for this as well, but for the life of me I cannot find an answer. So I do apologize if this a worn out question. But, if someone could please tell me the differance between the 3500A & a 3500AG that would be great. Also if they are differant drives will all FW avail, work on either of these drives? For example of someone says FW for NEC 3500A available now, would that same FW also work in the 3500AG drive? I think this would make a great sticky as I’m sure people like myself are wondering this same thing.