I have tried everything including the SD Card Formatter and nothing works. No matter which “solution” I try either it fails outright or in the case of copying or deleting files it appears to work but if I remove the SD and reinstert it everything is as it was before. The part that is weird is that I have two of the 64Gb SDXCs and both have exactly the same problem. I even put the thing against a super magnet I have is nothing happened. Apparently magnetism is not used for storing data anymore. It seems my soluting is to run the things through my paper shredder and buy a different brand of SD card, unless there is something I haven’t tried yet.