iOS + iTunes. I sync albums,photos and videos. You can not delete the files. For emergencies very bad. E.g I and my friend are for 3 days on festival. My iPhone has 16gb + all my sync albums (12GB). On festival shoot a photo,make videos etc.. iPhone memory is full because of the new photos,videos. This is normal. How can I help myself? I delete the sync albums,photos and videos. Now come the problem. This is a fact. iOS can not delete the synced albums,photos,videos. Android in my case Samsung Galaxy S5 + Kies. I sync albums,photos and videos. This concept is better. For emergencies e.g that with festival, I can delete the file.