A raw file is a collection of unprocessed data . This means that so far the file has not been altered, compressed, or manipulated in any way by the computer. Raw files are often used by software programs that load and process data on the basis of data files.
A very popular type of raw file is “Camera RAW,” which is generated by a digital camera. Instead of processing this image which is captured by the camera, this data is left unprocessed and uncompressed until it is opened by a computer program.