I have a Galaxy Express. So does my wife. I used to be able to plug it into my computer (W7) and access it just like a thumb drive. I no longer can. But I can with my wife's. I have not changed any settings, but something must have changed something. I have downloaded the drivers, it didn't help, which wouldn't make sense anyway because my wife's works just fine, just like it always has. It does charge, however, when plugged into my computer. What is wrong with this thing?