Default [q] How to use Online Nandroid

I'm trying to flash a new ROM for the first time (Currently running stock GS4 4.3), and I want to make a Nandroid backup first, in case something goes wrong. So I downloaded the ONandroid app, and opened it. Configured the settings like it told me, and nothing happened. It created a blank folder in my storage/emulated/0. I went back to the thread (http://forum.xda-developers.com/show....php?t=1620255), and it felt like I was trying to read Greek. Anyway, I have root access, I've got BuzyBox Free (I think, unless I need to do something more than download the APK and hit install), but I have no idea what the rest of the requirements mean.

If someone could either walk me through the process in plain English, or direct me to a guide, I'd really appreciate it.

Thanks!


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