1. You should format the mp3 with its built-in formatting function,then connect the computer and format the mp3 from the computer;
2. Sometimes this may be a problem of your computer---your computerís configuration is not compatible with the external equipment(mp3).
3. See if it works to copy files under safe mode.
4. Rule out the above possibility,that is more than likely the mp3ís problem,I propose to refund or repair.
thank u very much for the reply..now listen..i’ve installed the drivers and the device is working properly..but in the computer management under storage-removable storage-libraries I have my device crossed in red..so I’m not able to put anythin on it..i think sortin this library thing would solve the problem..can u help me with this pls?