On the phone, press the MENU/OK key and follow this path: Tools > USB Mode > Mass Storage. Connect the phone to the computer using a compatible USB cable and wait for the connection to be completed.
When the phone is connected, the host computer will automatically detect the phone and display the Mobile Device folder.
Drag and drop music from the computer desktop to the Mobile Device folder on the microSD card. Selected files will copy one at a time.
Congratulations, you've completed this tutorial.