I have a 10" Android 2.2 G Tablet (View Sonic). The CPU is NVIDIA Tegra. I am unable to download any updates, apps, or anything. When I try it says that I must insert a SD Card, which I have. I went to settings, storages, and it shows it is there and the available space, it even has an option to unmount it. I just can't download anything. I have went back to the factory settings also did the recovery mode but nothing is helping. I am ready to throw it in the trash. Please help.