I purchased a c200 from Currys. Camera works well but as soon as I put the brand new Sandisk 512gb into the camera,  it wouldn't reformat it and although I tried numerous times, it wouldn't not reformat it. I put the card into my computer and it had been corrupted. I will take the camera back to Currys and see if they can get it to work with an SD card but I do not want to put another new one in as it might corrupt another and I am not buying numerous cards just for the camera to corrupt them. I know that there are lots of threads on here about the same thing happening. Firmware and app up to date. I have followed the guidelines but nothing works.