Why do I have such little space on my iPhone 4?

I have the iPhone 4 and for some reason I'm running out of storage space, particularly with my photos. The weird thing is that I only have 668 photos on my iPhone while some of my friends have like over 1, 000… And I also have 600+ songs on the iTunes app.

When I went to the "Settings" button, I clicked on "General" and then clicked on "Usage." Apparently I have zero bytes available for storage and I've used 6.4 GB of space on the phone, most of it coming from Music, the Facebook app and my Photos.

I just feel like this isn't right… I don't have any apps from the app store other than the Facebook one and Soundhound, and the fact that I can't seem to store over 600 photos is weird. I've seen friends who have like 20 different apps and the same amount of photos as me and yet they still have space available. Why is my phone saying I don't have anymore available space when I've only used up 6.4 GB and the iPhone 4 can hold up to 8GB…

Other data? Alot of things can cause the other data to go higher then normal, and its often an app you have (and often jailbroken phones). See if yours is any of these: http://www.justtext.com/messageboards/20130215171154.html

If you have a 8 gb it will tell you are running out of space way before its suppose too my phone is the same way you still have 1.6 gb left its just a warning

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