Time Capsule and Airport Express (roaming and WiFi at the same time). How to implement on an optimised fashion?
I have a router, which connects to a Time Capsule (1TB, A1355). Such Time Capsule connects to one HP printer, an external drive and, additionally, this TC connects to a switch that distributes the signal around the house. I have three Airport Expresses (2 old ones [A1264 model] and a brand new one) to extend the coverage of my wifi signal, such that I can have the best internet signal on all rooms AND that computers can access the Time Capsule AND the hard drive attached to it. (I am not 100% sure the terminology that applies here is extend the network, please correct me if I am wrong and this MEANS extending my network). That said, I have not been able to set up the network efficiently, noting that two of the Airport Expresses (it can the two old ones or an old and a new one) can be wired ("roaming" as far as I can understand) and the third one (either the old or the new, whatever works best), would connect via wifi.
MacBook Pro with Retina display, OS X Mountain Lion (10.8.2)