Clarification: RAW refers to the image format found in a digital photo which is the most similar to film-quality and this format requires
a large amount of storing space. A RAW image has not been compressed or processed in any way after being shot. Someone mentioned the RAW image format as a “digital negative” as nothing is changed with this file when you store it.
Just a small number of entry-level cameras enable the data storage for the RAW image format. Meanwhile, the photographers at the advanced and pro levels prefers the RAW format as they can edit the digital photos by themselves and they don’t have to concern about the components of the image which can be removed by the data compression, for example: JPEG.