Why do my photos thake so much space?

I imported all my photos to my computer, mind you i had less than 300 photos, and still they take up 9GB.
Also in itunes it shows me this.
(i have an iphone 5, jailbroken, ios 8.1)
What should I do?

Added (1). take* Why do my photos thake so much space - 1

You've got over 4000 photos, of course they take up space. You can get space back by deleting some or by compressing them at reduced quality or at a smaller size, but given that hard drives cost something like 40c/Gb, why not just buy another disk and sace them there.

Raster images are extremely consuming in terms of resources. This was a major issue back in the day. Images have to store all of the pixels that are captured. On larger resolution cameras, that can take up large amounts of space… You can drop your resolution, move them to a larger drive, or just start deleting them.

Either delete some pictures, or start using a lower resolution.