I think the problem was the fact that they were saved in fat16 format...then thrown into a fat32. Somehow, the pics are all screwed up and look like a lot of the color has been reduced...to the point of showing jpg artifacts. Bummer...
So, interacting with another formatting thread here, I think you're screwed if you've saved pics in a fat16 D drive, move them to a fat32 C drive, reformat the fat16 D drive to fat32, then move the pics back to D drive...The quality is all ruined, a lot of color is gone, and they all need to be sharpened once or so...ugh
Ah - I've found your other thread. Moving data files around has no effect on them whatsoever. The difference between FAT16 and FAT32 has nothing to do with the data, only with the way the files are organised.
You have to look elsewahere for the cause of your problem - it simply CANNOT be the change to the disk file structure.