
I'd say, on the forums and group discussions there's about a post a month asking what do do if a memory card comes up unreadable, is formatted, or the files are corrupted. Around 2000, I started doing data recovery specifically for camera media-
PixelRescue.com, (...ain't the Wayback Machine great?)
There's really only one secret, and that's PhotoRescue.
PhotoRescue comes in a few flavors, a standard version and a "pro" version, but either way it does a great job, far better than anything. ANYthing I've ever used, and frankly I've used it all. I really don't understand why or how, but the software looks for, and rebuilds image files specifically, and it does a remarkable job.
As far as your chances go... If you've simply formatted a card and have not shot more images to it, it's a slam dunk. PhotoRescue will find and rebuild those files with no problem at all. If, however, you've shot to the card, then you're only going to get the files that you haven't written over- every time you take a new shot, you write over the old ones.
I've found that CF cards, if they're corrupted, recover pretty well, where the really tiny cards don't. It may be that they're simply more delicate, but if I hear of an SD card that is giving an error message, my first guess, and it's been proven out 100% accurate so far, is that the card is toast, and nothing will recover it.
I'm so impressed by PhotoRescue I've decided to become an affiliate. If you appreciate the information here, do me a big favor and buy the software through this link.
Now, another question I get a lot is on hard drive data recovery... that takes a little more horsepower, and it helps out a lot if you have a dedicated machine to chunk away for the hours it's going to take to rebuild the drive. I do that too, and it's what's called a "software recovery". Here are my rates for that,
email me with any questions.
Basic rates are based on what I actually recover- no success, no charge.
1GB and below- $100
over 1GB and to 2GB- $200
over 2GB and to 4GB- $300
over 4GB by quote

If the drive has a hardware problem, that is, if the heads have crashed, the platters are damaged or something worse, you need to
send it to DriveSavers. Period. This is going to cost you, the estimates are typically over $1500, but if you need a forensics-level recovery (that is, a clean-room teardown and rebuild), and the data is worth that kind of money, I wouldn't suggest dealing with anyone else. They're the best, they've been around the longest. If you do go this route, use this reference code:
PixelRescue DS13970. It will save you around 10%.
By the way... data recovery is one of the most rewarding jobs I've ever done. Whether it's coming from a pro photographer trying to save an assignment that can't be re-shot, or someone coming back from a once-in-a-lifetime trip who formatted a card by mistake, it just plain makes people happy. Check out some of my mail:
I can't even begin to tell you how happy you just made me!!! My dogs are going nuts because I am sooo excited, and jumping up and down!! My husband and I would like to thank you soo so much! I will tell everyone I know about your company and what nice people you are, and how quickly you resolved my problem! Thanks again :)
Kiera & Paul Barattini
"Thank you, thank you, thank you, thank you!! I will be sure to spread the word about Pixel Rescue!"
Dean
"You da man! Hey, if you need a testimonial... I am very excited about the successful recovery of my pictures. My photos involved clinical and lab images that involved an enormous amount of work and I feared they had vanished. Your salvaging them is just awesome. You were reachable, reasonable, and fast. I feel lucky to have found your site and would enthusiastically recommend your service to others...and you can quote me on that! "
Richard M. Levitan, MD
"AWESOME!!! Thank you SO MUCH! My wife will be overjoyed to hear her pictures were rescued. We were pretty crushed when we thought the pictures from our biggest vacation in over 10 years were lost (lots of tears). I am glad we thought to look on the internet for a company like yours to help us out (saw you on a Google search). Thanks again. " D. H.
"Thanks for helping me get my images back this week. You recovered images I shot months ago...
"Take the biggest number you can think of, multiply it by three, and stick a big, fat negative sign in front of it, and you'll be close to understanding the depths of my despair when I realized the ~700 images I had shot all afternoon wouldn't be coming off my microdrive and into my computer anytime soon.
"After a day of calling everyone I could think of for help, I turned to Pixel Rescue, whom I had just heard about at a seminar a week earlier. My images were back as quickly as FedEx could move them.
"Did I learn any important lessons from this episode? Absolutely. Tops on the list is to go right to Pixel Rescue if it happens again. Which it won't, 'cause I'm being careful... right? Find me some wood to knock on..."
Thanks, Rich Obrey
Sports Editor
The Current and The American Journal
"...after photographing celebrities at Fenway Park, my card was unreadable. PixelRescue was great, encouraging and was able to recover all of the images for me without loosing one. Thank you, Ted!" Jeff Dunn, Dunn Studios
"YOU'RE A GOD!!" -shutterbabe1
pixelrescue: "I was wondering if you could do me a little favor..."
anonymous photographer: "Sure thing, what do you need?"
pr: "Well, we have a little gallery testamonial site, and I'd like to use some of your shots. We also would like to get a little quote from you, if it'd be okay."
ap: "y'mean, like, 'you SAVED my BUTT?"
pr: "...um, yeah, that'd be good!"