I`m sorry to say this, but why don`t you just buy SDHC card in the first place?
but yes perhaps you wanna use it for your phone memory later so yes microsd is good to go.

so you`re saying that the adapter itself have no problem as it can be used to insert another microsd card and the 2nd microsd is working fine? but not the kingstone?
yet the kingstone microsd is not a faulty copy as it can be used in another camera?

perhaps it`s the files in the microsd card.
tried formatting the card?
and re-format the card while it`s in camera?

goodluck