Surveillance cameras record and store data by capturing images or videos of the monitored area through a lens and converting them into digital signals. These signals are then processed by a digital video recorder (DVR) or network video recorder (NVR), where they are stored in a digital format on a hard drive.
The data is typically stored in a compressed format, such as H.264 or MPEG-4, to optimize storage space and make it easier to retrieve and review the footage. The footage is often organized into segments based on time and date to facilitate quick access to specific events or incidents.
In addition to storing the footage locally on the DVR or NVR, surveillance cameras can also be connected to a cloud storage service for additional backup and remote access capabilities. This allows users to access the footage from anywhere with an internet connection and provides an extra layer of security in case the local storage is compromised.
Overall, the recording and storage of data by surveillance cameras involve a combination of hardware and software components working together to capture, process, and store the footage in a secure and efficient manner.