1. USB hub is being used.
Connect the player directly to a USB connector, as connection via a
USB hub may not work. However, a USB hub that supplies power
can be used.
2.Another application is running on the computer.
Wait a few minutes, and reconnect it. If the problem persists,
disconnect the MP3, restart the computer, and then reconnect the
MP3.
3.The USB connector on your computer may have a problem.
Connect it to another USB connector on your computer.
4.The remaining battery power is insufficient.
If you charge the MP3 when it has not been used for a long period
of time, your computer may not recognize it or nothing may
appear on the display. Charge the MP3 for about 10 minutes, after
which it should start operating normally again.
Reset the player under the following circumstances:
1.Can not turn on the player (before reset, connect to a computer
5