A:Answerthis happened to me try calling the 800 num..of amerzon,if all fails I bought a new one, but if yours is under 1 year you will get a new one call.
A:AnswerI'm not sure what you mean by the USB port. Are you referring to the micro USB port used to charge the device or transfer data? You could probably transfer from a computer through a USB *cable* (I haven't tried it on the HDX, but I could on my original Kindle Fire), but I'm unaware of any micro USB memory stick. There is no full-sized USB port on the device.
A:AnswerI love the kindle so much better than my laptop. Everything is so easy to download. Especially for people that don't know much when it comes to a computer.