Corina wants to get a mobile device that she can stream video to watch. How much bandwidth should she get for a 3G tablet? Leo says that 8GB is usually fine, but if she's going to stream video from it, it's better to stream via WiFi and not 3G. Video takes up a lot bandwidth and she can burn through 1GB an hour watching it. Most portable devices have a memory for WiFi that it's near, and will automatically join a hotspot.