When I try to copy music from a music player on my laptop to my phone (Galaxy S4 with Lollipop) via MTP, it always ends up getting copied to internal storage even though I have set the SD card to be my default storage for music in the My Files file manager. Is this something I've got wrong in Android? Or is it a deficiency of my music players or desktop OS? (I am running Ubuntu 14.10 and I have tried both Rhythmbox and Clementine as music players.)