I know this is an old post and I didn’t read though all the responses as there are too many but I just had this same issue.
I went to format on my laptop and I hit the “Reset To Defaults” in the prompt and it finally wiped out and reformatted the card.
I was getting an SD Error on my GoPro and no recognition on my Galaxy S4.
I now have solved this…hope this helps someone as I have a bunch of SanDisk cards as well.
