One should always make backups of digital images stored on their camera memory card. These cards store digital pictures in what is known as the RAW file format. A good idea is to simply copy all of the data in its RAW file form from your camera memory card onto your computer’s hard drive or other safe storage. Then you can allow the Twain software to convert your files to more common image formats such as jpegs. This way in the event that you need to recover digital photos you will have a copy of the original source files.
Having this allows you to recover photos far more easily. However you will need to purchase a targeted digital image or media recovery program that expressly supports the file types created by your digital camera. Every camera manufacturer uses a unique to them file type for the initial storage of data that has been converted from optics to digital information.