I have a galaxy S4. I had about 6.5gb of music downloaded. I got on my app today and the downloads are gone. The data remains on my external sd card, but doesn't show in the app as being downloaded. I also have an older zte phone that I use for just music. When I power off the phone, all of the downloaded music shows as not being downloaded and I have to go through the whole process again. Both phones have more than enough space. Anyone know what is wrong?