For example, NAS servers have free or paid programs for the NAS itself to act as an NVR, connecting to cameras via RTSP and storing all recordings internally, either in continuous recording or motion detection recording and sound. There are also somewhat more advanced IP cameras that have the RTSP protocol, this protocol allows us to view the camera through the local network, and also use some software that works as an NVR ( Network Video Recorder). In addition, the IP camera could also be carried directly. A thief who enters the house and is recorded with the camera, if the recordings are stored inside, it is enough that he also steals the micro SD card and he will have taken any evidence of the intrusion.The recording of these videos is generally not encrypted, so anyone who removes the micro SD card from the camera will be able to view all the videos you have recorded automatically.