It is possible to store a 4K Ultra HD Blu-ray disc with Ultra HD quality since it has a significantly larger capacity than a conventional Blu-ray disc. Normal Blu-ray discs look fantastic, but their maximum resolution is just 1920 x 1080 at the highest quality setting. Whereas, a 4K Ultra HD Blu-ray disc has a resolution of 3840 x 2160 pixels, which is the highest possible resolution. That's a fourfold increase in the number of pixels.