How do I backup everything for the replacement tablet?

Hello XDA devs, this is my first time making a thread here. To keep it simple, I have an Nvidia Shield Tablet rooted on OTA 3.1 and I have just filled the recall to get a new one. I use Busybox, GLtools and FolderMount. So I have lots of things made on thid tablet, my bootloader is open as well. I would like to know how I could backup this tablet so that I can make the new one just like this one without passing too much trouble. The fact that this one will be dissabled when I use the new one is also one of the problems that must not be overlooked.