Stewart wrote

  @KalleKat 

Hi.

I have 3 C210 cameras and all worked perfectly using rtsp with firmware 1.1.8 and all cameras failed using rtsp (with an SD card installed) with firmware 1.3.0

Several other users also reported the same thing and found that downgrading the firmware fixed things.

I managed to downgrade the firmware back to 1.1.8 and everything was OK again.

  @Stewart 

Alright. Thought you had C200. My cameras are still running 1.1.8 (no newer firmware available)