Could you please send me a copy of the file also? It will give me a reason to try my 3d printer for something useful. Not to mention the paranoia now that there's something else that could break.
I think DJI might have something against Samsung. I also use a Samsung 64Gb pro plus micro Sd class 10 U3 UHS-1 with a 90 MB/s write speed and I also get the "card to slow" warning.