At this level, we are no longer talking about a retail business but a site: a factory, a school, an office complex, a condominium, a logistics park.
What matters at this scale
Bandwidth above all. Thirty-two 8 MP cameras produce a data rate that an entry-level recorder will not be able to handle. Check the announced input bitrate in Mbps and compare it to the sum of your camera streams — this calculation prevents lost images.
Redundancy next. Multiple disk bays, RAID on Pro models, redundant power supply on some series. On a site of this size, a failed recorder means the entire site is blind.
WizMind
WizMind models go beyond detection: structured metadata, attribute search (clothing color, vehicle type), license plate recognition, people counting. With thirty-two cameras, this is what makes archives truly exploitable.
Architecture
Beyond 32 cameras, consider multiple recorders managed by video management software rather than a single, very large NVR. A failure would then be partial, not total.