Using 1Tb HD with Wii update
Here is the info you were looking for wheelo,
I'm using Homebrew and then I open Wiiflow USB Loader (IOS 222), (IOS 249),
I'v 219 games on it ( just under 500gb), I sent you update list by email,
The HD I got is :
1TB Medion HD Drive2Go, in Aldi's for €89.99, it uses external power source.