DSC - Nikon Disk Identification File is a file extension that consists of different information about pictures that are taken using a Nikon digital camera. It comes in handy because it can all be saved on a simple memory card right along with the pictures since it does not contain any image data. There may also be DSC files hidden on the card because they are referenced by this camera software. They are not meant to be opened manually. There are also many different digital camera that save pictures with filenames that begin with DSC This extension can be downloaded online.