Well my frustration continues. I think a lot of this just has to do with the fact that this is a new Samsung product and it just isn't supported by apps to allow for caching or use of the microSD. I did get with Slacker today and they did reset my account so I could cache and it did cache, but to the built in flash memory. They had me try several things, but nothing would make it push to the microSD card. You know its just frustrating because I finally got an Android device that I really like and I be damn the main thing I want to use it for, I can't because of this issue. I don't know rather to hold on to it in hopes that this gets solved with updates or just bit the bullet and give up. Tell you one thing there is much to like on Android and I am digging it. I guess I just picked the wrong Android device to take a darn liking too. OH I did get an email from Rdio support and they are telling me that with the newer Android devices they are not allowing it to make use of the external SD. I even tried Spotify and Rhapsody and none of them would cache to the microSD card either, so this makes me think this is a problem with this player and/or the lack of support for this player by apps. So in terms of music services I am dead in the water. I did play around with the Google Music app and my Google Music account. That works very well, but its just works with my own music and over the last several years I quit buying music, so I have huge gaps in my music collection.