I just accidentally deleted from my Sandisk SD card about 120 pictures that I intended to copy first to my hard drive. I installed the free Recuva, went through the guided steps but ended up with it finding photos that say unrecoverable. Rather than the typical IMG_#### that they are usually styled, they have only MG_####. It found over 400 photos, but they say unrecoverable. Any ideas of what else I can try? Please??