They'll almost certainly be for games. When you download games you'll find that many of them will ask you if you want to download extra data after you first run it. If you download it, it goes in the Android/data and Android/obb directories.ok download the app and its seems that folder that Called Android takes 4gb .is there something that i can delete for this folder?
the are two folders Inside
obb/ = 1.8gb
data/ =1.5gb