The compact digital camera Nikon Coolpix S100pj with features including a 12.10 megapixel CCD, a 5.00x zoom lens, a 2.7 inch LCD of 230,000 dot, 80-6400 ISO, a maximum aperture varying from f/3.9 to f/5.8, a built-in projector, has, besides its 36MB built-in memory, SDHC and SD cards for its storage media. As is the case with any other sort of external storage devices, data lost or deleted from SD cards are lost or deleted for good, because they when deleted do not go to the Trash or Recycle Bin to get recovered.

We usually use data backup program built-in on all computers and some recent digital camera models. However, if this ready-made facility cannot help, we have only to use certain