A frequently asked question is how to recover lost photos from a memory card. If you've lost images, try photo rescue software. Here is an article about the process and what to expect:
http://www.digicamhelp.com/digital-photo-recovery-and-rescue/index.htmMany at this board have said that the free recovery utility,
Art Plus Digital Photo Recovery, works well. A link to it, and other digital photography utilities, is listed here:
http://www.digicamhelp.com/free-digital-camera-software/index.htmThese types of programs can be quite effective, though they don't always recover every image and some recovered images may be damaged. But it is well worth a try to recover your photos, even if you've formatted your card.
If a recovery program doesn't work for you, consider contacting the manufacturer of your memory card. They can often recover the images but be sure to ask the cost becaue it can be expensive.
If your card is corrupted, many have found
Art Plus Memory Card Safe Eraser very effective too.