My Iphone photos take up a ridiculous amount of space?

My iphone says my photos take up about 500 mb (which isn't necessarily a lot… ), but I only have about 18 photos. Why is this? I deleted over 100 pictures a little bit ago, and that didn't remove much of it. Why is this?

It must be application cache. Clear them by downloading App Cache Cleaner from app store

Due to the camera being a good quality, it means more pixels have to fit in, so it would be a larger file then normal.

However videos can take even more, because they are HD, also a average photo took on a iphone 4s would be 3.3mb for every single picture

  • Why does my small amount of photos take up so much space? On my iPhone 7, I have only 76 pictures/videos. When I click manage storage, it says that they take up 1.3 gb of space, while my friends have hundreds of photos but when they click manage storage, it only takes up a couple hundred mb. Why do the photos take up so much space on my phone or how can I fix this problem?
  • Why does my photos take space on my iPhone? I noticed my photos took 3GB of space so I deleted them all. I go check my space again and it says my Photo Library takes 1.8GB
  • Why does my iphone say my photos take up so much space? I have only like 300 photos in my iphone and it still says that it takes up 4GB and its frustrating since i've already deleted over 700 photos and my phone still does indicate much change of my storage space. Could it be that there's some hidden location all my photos have been saved or something?
  • Why are people still selling old iPhones for ridiculous prices? It seems like every time I look up iPhones for sale, the price it's being sold for is ridiculous on the older models like the 6s, 6, 5s, 5c,5, 4s, and 4. Why do people justify selling them at these high prices