Connecticut photographer Tony Northrup breaks down the advantages and disadvantages of raw and JPEG images — including file size, quality and when one option is preferred over the other — in a video from 2012.
A JPEG file tends to be about 3MB, whereas a raw file might be 25MB. The difference is important. The raw file is giving you way, way, way more data. In fact, it’s giving you every bit of data that the sensor captures.