Nightmare story. Don't read if you don't want to feel ill at ease. Shot some footage last week, first or second time on a new card. Lexar 633x 64GB bought from Peau Productions for a great price. Too good to be true? When I went to format the card, I couldn't. Tried all sorts of recovery stuff, nothing worked, in any machine. Reported file system errors, but could not fix - card write protected. But when in the Typhoon H, it did format .. at least it said so. I pressed record and it went in,to record, but I didn't check. Shut down, and today, went out, drove about 100 miles. Found some cool stuff, flew a lot actually used 3 batteries in the same location, and landed on an icy lake, etc. Great time. Got home ... I see only footage form my last shoot (prior to the format). No recovery software detects anything other than the files from last week. Bummer. (understatement) Asking Peau Productions for RMA. Lesson: CHECK YOUR STUFF before heading out.