Lets say your hard drive crashed. You can’t recover the data from it. No matter what you try it just seems like the data is gone. You need to try the following. The first two are cheap to free hard drive data recovery methods thats PC INSPECTOR AND SPINRITE. PC INSPECTOR is windows based while SPINRITE is dos based… If that doesn’t work then your next best option is to try ONTRACK. They are a data recovery service and, from what I hear, they are one of the best.
You boot into spinrite from a thumb drive…
if nothing works check out ontrack data recovery