I've searched here every way I know to for SD specs for my 7022. I know it can handle 32GB, but I need to know what class works best in this unit. I've read about HS, UHS-I and UHS-II, which I know has to do with bus width, and then I've noticed the different class speed ratings. Class 2, 4, 6 and 10. I'd like to know what is the maximum spec that's reliable for me. Thanks for everything.