Brand New Lenovo Tab4 8 has a new 64 GB MicroSD card but doesn't show up when connected to the laptop even though it reads in the tablet. I have formatted it for internal memory but when I connnect to laptop with USB cable it only shows the internal memory the tablet came with. Doesn't show there is even a MIcroSD card in the tablet. How to I get it to show up when I connect to my laptop so I can unload books and movies and such? Thanks for your help.