Simple Plug-in with Front USB Port and Front Aux Input With a dedicated USB input and USB cable, you can even connect USB memory devices like thumbdrives, USB hard drives or an iPod. Song lists on USB devices are displayed in alphabetical order, and allows eight levels of file / folder search capabilities. This unit will find music files while ignoring other file types on the USB device. Note: MP3 device or cell phone cannot be independently controlled through the head unit.