Recently I've tried t update some of my apps and my D2G is telling me (Amazon apps) that there's no room on my 32gig SD card. I know I've got a BUNCH of music on the card, along with album art, etc. But.....what I've also found on the card now is bunches of apk's for apps I've got installed. Do these apk's need to stay on the card, can I delete them and not lose the installed apps, ???? I've been going through the music on the card and deleting all the country and western I can find (don't listen to it, don't need it on the phone).