What are the photos taken by a 30-megapixel camera?

The photos taken by a 30 megapixel camera can't be washed at home! If you use the RAW format, then a photo with too many colors will take about 70M, which is generally impossible to upload to the Internet, but it will actually be uploaded to the Internet. If your monitor is only 17 inch, what you see is no different from that taken by an 8 megapixel camera.