Hi - I've just got a new Android Tablet and this morning find myself quite disappointed in it. In order to use files, etc, also camera, I needed to get a micro SD Card. Got a micro Sandisc, HCDC, and on inserting into the tablet I get the message that the disc is faulty. It was new, still in package. Could it be I have the wrong type of disc. If so, which one do I need? Help!!