Hello all

I have got an iPad 3 16GB wifi and I have been using it mainly for websurfing and manga (japanese comic) reading.
For websurfing I do not need to do anything but simply go on Safari and that is all.

The problem or strange thing I get is when I sync my mangas to my device.

I download the manga episodes online as zip files, unzip and sync on to my iPad as "Photos".
Up to this stage, nothing is wrong I can read it all good. The problem happens when I have a look at the storage.

The only "Photos" I have on my iPad are mangas (the complete series of Inuyasha, total of 10512 photos) and on my PC, the total size of it after unzipping is around 2.20GB.
After syncing it on to my iPad, it shows that for "Photos" I have used 7GB+.

Does anyone can clarify this to me?
Does iTunes somehow makes the image quality better, and therefore, resulting in bigger size images?


Many thanks!