Insert your micro SD card into your micro SD adapter and connect it to your computer. Micro SD adapters can be plugged into a USB port on your computer.
Open "My Computer" and double-click on "Removable Device."
Open the computer folder where your music files are stored. Click and drag your music files into the "Removable Device" folder.
Unplug the micro SD adapter from your computer and take your micro SD card out.
Insert the micro SD card into a device that supports music files; i.e. a mobile phone.
Access the media/library section on your device, and your music files will all be available to play.