Originally Posted by allen175
Im getting the same message, I just got a Sandisk UHS-1 Class 10 64GB, and speedtest readings with the sandisk tool is 20+mb/s. Maybe its just a bug with it not reading how good our cards are.
If you are having issues with SD Cards, post the format you are using, i.e. exfat, ext3, ntfs, etc... Also, how you formatted it, via laptop, or on the Android device itself.
I have a 64Gb & a 128Gb San Disk SDXC UH-1 & both work excellently. I do not know if it has been fixed, but at one point 64Gb Sd Cards came formatted in exFat, which Android did not support over 32Gb. Maybe they've fixed that, but I don't remember what I formatted to last, it was a few devices ago.