Almost every major quality digital camera maker initially stores their files in a unique to their company format. These proprietary file types are known as RAW files. Raw files contain data specific to the creation of the photograph with the scope of the manufacturers design. When you download your camera’s files onto a computer hard drive or other digital media such as a USB flash drive, the software handling the download converts the manufacturer’s files to a more common image file format such as a JPG or JPEG.
Unfortunately the transfer does not always go as one would hope and very often files are lost. When this happens you will need a digital photo recovery program designed to search through your digital camera’s storage and recover those original manufacturer formatted files. This same program to recover digital photos should be able to quickly scan your computer’s internal hard drive and recover from it any accidentally deleted image files in all the popular formats.