Instruct: Classify Amazon reviews into positive or negative sentiment
Query: [...]

[...]i had always used this mp3 player as a piece a cake.But when i took it into the mountains in the domninican republic, it stopped working. had taken it in airplanes and it always survived. now it only works as a usb flash drive.usb= on but no backlight.batt= nothingusb + batt = on with backlight.Dont buy. Its overpriced anyways for this time on planet earth with all the modern technology