I also have the same problem with Kingston microsd 32 class 10 and trancent 16 class 10.
In Android SD does not recognize SD or shot it as 1,86 GB (instand of 36 or 16) without access it in file manager and in windows does not recognize the card error 10 in driver (device manager).
I install the bios “X98 Plus(A5C8)_Solve TF Card Recognition Problem” but it did not solve the problem.
The Teclast tables have serious problems with support. Without SD card the tablet is (specially the dual boot) useless, even if you use an external USB you loose the power port.
Are there any SD cards that works in that machine (Teclast x98 Plus A5C8 dual boot).
This purchase was total a wast of money.