I ran into some weirdness like that when I first got my mini. I finally formatted the card (FAT), full format not quick. Then it worked.
How many SD cards do you have on hand? Might try another one, formatting it like Corey said, then see where you're at. I've never seen that issue, and I use an XRT on my cummins, and used a Mini Maxx in my 2012 PSD. In fact I just updated my XRT, still no issues. I highly recommend getting a backup card, just in case.