All of a sudden lots of my NEF files were gone. After finding them in the recycle bin they turned out to be NEF jpg. files... Yes, both! and only 72 dpi, sometimes not more then 88 kb. I have no idea what happened. Has it been some kind of crash?
I use Photoshop. I extracted the files with Adobe Bridge and stored them. After making a copy to a separate hard disk, I checked if all of the files were there. Then deleted on the computer meaning to copy them on one more hard disk. After deleting, all of them were gone except for a few images that became as I understand thumbnails. Most of them are lost, not even traceable with special programs.