OK,,the 64 GB one I had must have been corrupt or fake...I found another 16 GB one, put it in, formatted it with the Tab, was able to move an app. Time will tell I guess.
I updated to kitkat like everyone else,, I need space bad. I see the option to move apps to sd card but it wont allow it, does anyone have an answer yet? I bought a 64 GB card for it when I first got it, now I want to use it. Thanks Pete