After running Recuva on "movie" files on a 64gb SD Card I use in my Camera it listed about 37 files.
All but 1 are marked green (dot) and indicate an excellent chance of recovery.
When I try and recover any or of them to my PCs HDD I get the following message against each file; none are recovered.
"The volume for a file has been externally altered so that the opened file is no longer valid".
What does this mean and why does Recuva report (seemingly incorrectly) that I have an excellent chance of recovery for each of these files?