So about a couple of months ago, I realized instead of having an 8 GB Capacity, it was 7 GB, and suddenly all the space was filled up, and I couldn't even download any small apps because there was no room. So, I just deleted a few things I didn't need, but it stayed at 7 GB. Then suddenly after we came back from vacation it said there was 6.8 GB. It's really weird how it keeps going down, and I have no clue what's happening since I'm not a tech-type of person. The same thing is slowly starting to happen to my sister too.