I believe SMB is strictly LAN, and AFP is strictly WAN.
My ISP hasn't blocked SMB or AFP, since they all work. I can access my Time Capsule over WAN via AFP with my MacBook Air. I can also access my other computers over LAN via SMB.
Does GoodReader have the ability to stream/preview files/pictures/videos, without me having to download them?
I downloaded an app called Files Connect (it works with AFP), and it allows me to stream/preview files/pictures/videos, with the exception of MKV files. Files Connect works the same as FileExplorer, except the layout is not as nice as FileExplorer. It has that older iOS look, compared to FileExplorer's modern look.
I sent an email to the developer of FileExplorer to enable AFP.
Do you know of any other apps that can use AFP.
I tired GoodReader, but it asks me for an email each time, which I don't want give them. I'll use FilesConnect for now, unless I find better.