How to repair micro sd 16gb card? It shows 31mb

Same problem here, but for a 64 gb model. Quite bad…

What caused the problem:

Trying to create an encrypted osx file system on the SD card.

(plz don’t discuss the WHY now)

What i did so far:

Testing in Win/Lin/OSX. None of the tools works. dd can just copy 32 mb, fdisk won’t write any new values.

Also testet different adapters.

Also tried in n900. Does not boot with the card.

Formatting in an Android tablet does also not help.

Last hope would be the GoPro camera?

But i guess i burned the card…