Under the Infotainment panel will be an SD card slot. This is intended to allow the driver to bring personal music files, or even video files for the back seat (select trims). This can be in addition to the files on the phone. Therefore, the driver can have a set of music files that is on the SD card and play when plugged in. The SD card can also be used to issue an update of the vehicles OS, and yes, all modern vehicles have an operating system. The maximum of the SD card size is 1TB which should be more than enough for the needs of the driver and occupants.