You can use a USB drive filed with music with your sonicTransporter. To do this first attach the USB drive to the sonicTransporter.
From any web browser on your home network enter the URL www.sonicorbiter.com to locate the sonicTransporter's GUI.
Click manage next to the unit you want to configure.
Click Apps -> Settings -> Drive Mounter
Select your USB drive and where you want to mount it. It is best to use the default mount point.