One solution is to trsnsfer your older iPod files to a thumb or flash drive of suitable size. You can then store the drive in your arm rest, with a short USB to USB cable connecting your Impreza to the drive. I have not been able to find a way to play music from separate files on the drive, as my older 2012 Legacy will do. It seems the HK units do not allow that operation mode without some programming which I do not understand. With your thumb or flash drive connected to your IMP, you will be in permanent shuffle play mode, and can choose the next selection from your steering wheel or the screen. I drive a 2019 Premium, and all works well.