Background image weights so much

Hi,
I have a problem with all my images in unity. The texture type of all them I put to sprite (with generate mipmaps disabled and compressed format) however the images weights so much in the unity binary. A single background image which only weights 100 Kb in the operating system file system, in unity weights 1.5Mb. Why? Is anyway to go round this? Because I’m using hundreds of images (50Kb) and the resultant apk is huge (100Mb).

Thanks

That is the size of the Texture in unity, your Texture in likely a custom format unity made for the engine you simply drag it in and it imports (converts) it to a texture format that unity uses. You can only set compression and avoid true color to try keep the size down. consider using a lower resolution?

Why are you using hundreds of images? there may be a more efficient way than to use hundreds.

The resolution I’m using is quite low already about 300x400, I have so many images because it’s a quiz game and every question have an image, and there are about 200 or 300 questions. There is an option to not decompress the image and just use the file system size of the image in the binary?