Groo - in terms of storage, my Fire has 1.17GB allocated for apps and 5.37GB for books, music, videos, etc. So there's a total of 6.5GB available. I'm not sure if the space can be reallocated if you need more room for apps, for example, but I haven't had a problem with running out of space and I've even got a couple Flixster movies stored directly on the Fire right now.