My iPhone keeps saying I have no more storage?

I have a 16 GB iPhone 4S, and my phone keeps telling me I have no more storage left when all I have is ONE app, 130 pictures, and 524 songs. What is taking up all this storage on my phone?

The system takes up a lot of space to start with. A lot of your space is probably taken up by songs and text messages. If you have any videos, that takes up a lot of space too.

Well mostly, it's not always the app. It can also be the pictures and songs like that first user said.
Because my teacher got a notice from her phone company about her son's cell phone saying that the storage was used up and she checked what was exactly used it and what was taking space and it was only his pictures. She told us that he was a "picture freak".So yeah, it doesn't always have to be apps to take up space on your phone or iPod(if you have that guessing not since you already have the iPhone 4s).

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