I have had a Toshiba Experian 64GB card in my Hi12 since I got it and up until yesterday it worked fine. Now I get an explanation mark on (device manager) ‘SD Storage Class Controller’. The card works perfectly as I have tested it in 2 other systems / card reader. This seems to be the same problem I had with my X98+ which also originally worked with a 64GB card (until a later update). Has anyone got any ideas or newer drivers?
I have the same issue that seems to be a hardware fault with the internal card reader as it sometimes works when the card is pressed in firmly but can’t rely on it. I don’t use Windows on this tablet any more so my work-around was to reflash the tablet with 53 GB data partition and make it Android only.