I Matricom G-Tab Quantum, was wondering if anyone knew how the SD card work? I bought 16 GB and it shows SD card icon in notification but click on it nothing happens. Looked for it in the storage its there but can't store anything on it. I have internal memory as well as a SD card inside but that's 10gb not one I bought. I'm confused. I even unmounted it and put back in, it checks it but nothing. Help please.