There's is nothing you can do when files get deleted they're unprotected, therefore any additional read and write activity on the file system could corrupt the data as it would appear to be the case with your memory card.
Reading from memory card would have no effect because you're not changing the contents.
Recuva can only recover what it finds no different to any other recovery program the files are damaged beyond repair.
If you want to try something else then I can recommend the following: Handy Recovery, DiskDigger (both freeware) and trialware tools by DiskInternals (Partition Recovery, Flash Recovery, Uneraser).
Reading from memory card would have no effect because you're not changing the contents.
Recuva can only recover what it finds no different to any other recovery program the files are damaged beyond repair.
If you want to try something else then I can recommend the following: Handy Recovery, DiskDigger (both freeware) and trialware tools by DiskInternals (Partition Recovery, Flash Recovery, Uneraser).
Richard S.
in theory if you deleted everything on your memory card and ran recuva within minutes should it find everything?
In theory files should be recoverable after deletion however in practice it's not always the case and I'll give you a little example.
I was cleaning out old mp3 files via the Command Prompt and made the mistake of deleted a song I wanted to keep.
Before I did anything I started Recuva but I couldn't recover the mp3 apparently part of the clusters had been overwritten by another file.
I found that rather strange considering the file in question already existed on the hard drive long before the other mp3 was deleted.
So I tried a handful of other recovery tools at my disposal but the same problem the file was damaged and was not recoverable.
I know for a fact the mp3 was not overwritten I'm guessing when the mp3 was deleted the information about the clusters it owned was damaged in the process.
Bottom line is recovering files is an imperfect procedure that doesn't always yeld successful results you're always at the mercy of chance.