So, i'm wanting to boot off of the SD card and then have the root file system, all the tools etc, on the pidrive.

I've attempted this a few times using steps outline for raspbian, but obviously it doesn't jive well with kali. Editing of certain text files in raspbian isn't possible since they don't even exist in kali

Does anyone have any idea how to go about this? Or even just a point in the right direction.. no matter what i do, it still only uses the SD card.