I have a buggered micro SD card. I tried reformatting it using Disk Utility on the Mac & from the recovery drive. Alleged success from the latter. Tried formatting it in two digital cameras, no go. Used DiskWarrior Recovery Maker to reformat it as a DiskWarrior startup drive. Allegedly successful. But no: each time I finish doing something to it, it reverts to having one movie file on it. I can't even trash the file, trying to do so brings up this error:
