I have Galaxy S5 with 16 gig internal and it seems I'm always running low on space. I try to move all my apps to the external card but it still says I'm using 7 gigs for "Application Data". I simply cannot figure out why. If I look at the biggest apps, there's only a few and they're 300MB or so. I would estimate everything in the "All" list only adds up to 2 gigs, not 7. Where's all this other data?