OK. Number one thing to note is that the tech side of wi fi is utterly meaningless to me. I do not know how it works, what the acronyms mean or anything of that ilk. Please bear this in mind when replying. I'm a photographer, not a network engineer! ;-)
Presently I have a wi fi network set up as follows:
Vodafone supplied Home Network HG 556a connected to jack filter
Apple Airport Extreme (2007 or 2008 vintage, the first large flat square ones) connected to the HG556 with Ethernet cable
Drobo network drive connected to the Apple Airport by USB 2
2 Airport Express units extending the network
The system runs as two wireless networks (lets call them Apple and VF) and the Apple one is WAY slower than the VF one.
The only other connection is a network printer.
What is the most effective way to improve this system? It has grown organically and seems a bit Heath Robinson.
All the users in the house are using (and will be continuing to use) Apple kit. Is it best to just buy the newest Airport or is there a better way that works well with Apple?
PS Note that the house is all concrete with steel rebar in floors and ceilings so not a wifi friendly place! Needs either an extender or an uber powerful signal.