I don't think you get it. Phanton prefers to use HxD to cheat. To do that, he has to take his SD card out of his Wii U and plug it into his computer, so that he can edit his save. Yes you can use JGecko and not remove your SD card but he doesn't like to do it that way. That is literally all he was trying to say. I hope you understand now.
As for me, I use both methods, as it depends on what I am trying to do.
I hear everything you are saying but I dont think you are listening to me. Please read carefully.You should never have to ever take out the SD card whether your inspecting the ram or hex editing your save. I have no idea why you would ever need to take it out.