Welcome to Android Central! You have a few options:
1. Connect the phone to the Surface via USB and transfer the music files using Windows Explorer by dragging and dropping to the Music folder in the phone's main directory.
2. Transfer the music files directly to an external microSD card (preferably in a folder called Music), then insert that microSD card into the phone.
3. Upload the music files to a cloud service like Google Drive or SkyDrive, then download them onto your phone, and then move the music file from Downloads to Music.
08-25-2014 07:24 PM