So, what slot does your tablet have? You mentioned you were using an SD card (64GB, which is actually an SDHC card) with an adaptor.....is that correct?
What does the adaptor do? Is it a SD to USB adaptor?
Also, the tablet your using, what is the OS? Is it Windows? Is it Apple iOS? Is it Google OS?
YOu mentioned "Duh.....tab 10".....but unfortunately that does not exactly help.
Is it made by Dell? Is it made by Samsung? Is it made by Lenovo? Who made it?