4. Music storage - MP3 player

This device can store and play back mp3 formatted tracks.

It is loaded by connecting it to a computer with an USB cable. The music library application then 'sees' the device and you can transfer the tracks into it.

Or you may see the device as just another folder on the computer so you can drag and drop files into it.

Files are stored in solid state flash memory within the device, so it is very portable.

For example you can jog whilst listening to music and it will be not affected by the movement.

Many smart phones also have a built in mp3 player.