How much g space can an analog camera occupy on the hard disk in a day? I need to install 6 analog cameras to record 24 hours of video and store the video for 3 months.

This mainly depends on the pixels of the camera and DVR.

Or NVR

The format of video saved by hard disk video recorder.

Display normal analog 700 lines or 800 lines, if normal and clear.

1 camera

According to the general size, a camera takes up about 10- 15g of memory a day.

every day

According to the maximum calculation.

Six a day is 90G.

Then calculate it in three months.

90*90 is equal to 1800G, which means that a 2T hard disk can last for almost three months, and there are more than 400 2T hard disks.