| Most likey the re-format/factory restore procedure, and use of the drive there-after, over-wrote parts of the data you are trying to "un-erase", making what you have been able to recover incomplete or corrupt.
I don't think there is any way you are going to be able to recover this data.
If you are willing to spend the money, it's possible a data recovery service might be able to recover some of the files intact, but I would have my doubts, and these services are not cheap. |