About half of the files on my card from a recent visit to the Huntington gardens did not show up when I came to download them, but I knew they had to be there.
When I first put the card in the card reader, Windows immediately told me there were errors on the card. At that point, only 5 photos appeared in the download import. After I ran check disk on the card as was recommended by Windows, there were suddenly about 130 photos, but I knew there were more.
A few years ago, a card had gone bad on me when I was taking photos of a wedding, and that worst week of my life ended well when after searching and searching for software that might recover the photos of the actual wedding ceremony itself I finally discovered Rescue Pro.
Once again it found and recovered all the missing photos. Thank you, Rescue Pro! Add it to your took kit!
Here's a site where you can download Rescue Pro. It should be free, or near to it, as I'm pretty sure it's distributed by San Disk as "freeware".