GoPro Hero 4 Session not switching off

I recently got a GoPro Hero 4 Session, it seemed to be working fine, but I had some issues with the recording switching off. After a few days I noticed it was only recording a few seconds of film, I tried formatting the SD Card changing the settings, but nothing worked, then it just froze and I could not switch it off. When I tried to restart it (10 second method) it would restart, but I could not access any menu, it would not record and would not switch off.

In the end I sent it back for a replacement. With the new one I received I tried again, but it would only record a few seconds. In the end I found the issue was that the SD card I was using was a SanDisk 32GB Ultra, this card does not work with the GoPro. I ended up buying a SanDisk Extreme card instead and now the GoPro works fine. It is a case of you pay for what you get and the Sandisk Ultra is a cheap card compared with the Extreme version.