Well I found "the final solution" for my locked sd card - trash can and replace. Tried formating in three different cameras, tried several different addapters, and nothing. Mine failed after writing a linux OS to it, then using it to boot my Orange pi pc card. It booted all the way but when I went to enter my password the machine froze, the card has never worked for anything since, and reports that it is locked even though there is no lock key on micro sd cards. As stated above, this is an indication that the card is damaged beyond repair, and being as small as they are, throwing them in the trash can is really very easy. If you think you might have some data that could be dangerous if released, take a pair of pliers and squish it, or run it through your shredder.