NIB A65 (classic)

So I have a NIB A65.

I got off the phone with Navionics - This is on its Obsolete list now.

I read a thread from 2013 that Navionics + would work with it.

I would like this unit with usable maps, but what maps can I put on it.

I have read it only does 2gb max.. but what can I still get for it.

Thanks

James