I have had problems with SD cards with files in them becoming unreadable for no apparent reason, maybe static electricity. In those cases the cards, when inserted in the camera(s) or a computer produce a message that the cards need to be formatted. If I do that, I presume, the files will be lost. I purchased RECUVA to recover those files and now I see that RECUVA cannot read the cards and wants me to format them. Is RECUVA any good?
I purchased RECUVA
Since you state you've got a license for it you're entitled to get official support directly from Piriform located here: http://www.piriform.com/support