I've never heard of any computer, which would open 0KB file. Mine, obviously, doesn't open your 0KB file, so I guess, there is something wrong with my machine.
Second image (3.75KB) is only 113x150 pixels, so how do you want to open it in full screen? Full screen, depending on monitor resolution, may be like 1280×720 pixels. Surely, you can save 150x113 image as 1280×720 image, but it'll be very grainy, and blurry.
Below is your 113x150 image enlarged to 760x1280...