Recently we have discovered a big problem of a batch of google android tablet PC which can't store anything without a TF card. Usually when you have just downloaded one mp3 music but it will fade away without any sense. But once inserted TF card, it could work normally.What's the problem of this? Almost everyone tablet pc comes with one 2GB memory space. I blieve that with 2GB memory a tablet can store one mp3 esaily, but the reality is just different. Is there something wrong with the google android operating system?