Damage varies so one day it's Testdisk, the next day Recuva saves the data.
Then there's the other issue. I never work on the original drive. I clone the drive and try recover systems (link to follow) on the clone. Only your new to recovery folk work on the last good copy.
More at http://www.cnet.com/forums/discussions/lost-and-found-or-the-storage-forum-sticky-354911/
I have an external hard drive which is not being read by my Win-7 Computer. I have a data recovery program which tells me that the data is still there, however, I think that the issue is something to do with the partitions. What is the best program to use so that my computer will once again read the drive?
Chowhound
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