At an illustrative 8 Mbps per camera, sixteen cameras generate about 41.5 TB over thirty days before margin. At 4 Mbps, the same math is roughly 20.7 TB. Real settings must replace these examples. The worked storage example becomes useful only when its assumed bitrate is replaced with site data.
At a warehouse needs a defensible storage quote rather than a single optimistic number, Use bitrate × seconds × cameras, divide by eight for bytes, convert to TB, then account for usable capacity, RAID choice, and operating headroom.
Show the 16-Camera Storage Math
Use decimal units for a transparent estimate. At 8 Mbps, one camera produces about 86.4 GB per day. Sixteen cameras produce roughly 1.38 TB per day, or about 41.5 TB over thirty days. This is before margin and before considering usable space after drive or RAID choices.
Use bitrate × seconds × cameras, divide by eight for bytes, convert to TB, then account for usable capacity, RAID choice, and operating headroom. When RAID is considered, show both the usable capacity after protection and the process for replacing a failed drive; redundancy is not free retention.
Halving the configured average to 4 Mbps roughly halves the result to 20.7 TB. That does not mean every 4K camera should be forced to 4 Mbps. Fast motion, detailed scenes, noisy darkness, frame rate, and quality expectations determine whether that bitrate preserves useful evidence.
Use a Range Instead of a Resolution Promise
Check the exact product role before selecting DS-9664NI-M8 64-Channel 8-Bay NVR with RAID & 8K Output. Its store record identifies and centralized management for large deployments, and sixty-four channels, while a warehouse needs a defensible storage quote rather than a single optimistic number determines whether that role belongs in this storage for 16 4K cameras for 30 days plan.
4K is a resolution label, not a bitrate. Quiet scenes, noisy night scenes, frame rate, codec, and quality targets can move the result substantially. For sixteen 4K cameras, treat the final terabyte number as a measured range with headroom, not a promise derived from a label.
At a warehouse needs a defensible storage quote rather than a single optimistic number, At an illustrative 8 Mbps per camera, sixteen cameras generate about 41.5 TB over thirty days before margin. At 4 Mbps, the same math is roughly 20.7 TB. Real settings must replace these examples. Keep that answer attached to the user task, the operating settings, and the evidence or workflow the business expects to recover later.
Drive Bays Change the Practical Options
A recorder with several drive bays offers more practical paths than one very large disk. Buyers can distribute capacity, plan replacements, or use supported RAID, but redundancy consumes usable space and does not replace backup of critical exports. Confirm the NVR’s supported drive count and capacity before ordering disks.
Run a pilot for at least several representative days. Record average and peak bitrates for a busy entrance, quiet interior, and difficult exterior night scene. Recalculate from those observations, add growth margin, and document the final retention expectation. A worked range is more honest than promising one exact number from resolution alone.
The worked storage example becomes useful only when its assumed bitrate is replaced with site data. Use bitrate × seconds × cameras, divide by eight for bytes, convert to TB, then account for usable capacity, RAID choice, and operating headroom.
When RAID is considered, show both the usable capacity after protection and the process for replacing a failed drive; redundancy is not free retention.
Replace the Example With Measured Site Data
Use the written result to guide expansion. A new camera, device, or changed operating rule should inherit the same test standard only when the related power, network, storage, and scene assumptions still hold.
Use the requirement at a warehouse needs a defensible storage quote rather than a single optimistic number as the filter. Use bitrate × seconds × cameras, divide by eight for bytes, convert to TB, then account for usable capacity, RAID choice, and operating headroom. The configuration is meaningful only if the completed path produces the defined outcome under those conditions.
A durable design states its non-fit condition plainly: 4K is a resolution label, not a bitrate. Quiet scenes, noisy night scenes, frame rate, codec, and quality targets can move the result substantially. The project should resolve that point before labor or multiple units are committed.
When evaluating storage for 16 4K cameras for 30 days, place the difficult condition first: a warehouse needs a defensible storage quote rather than a single optimistic number. Then test the function that staff actually need, not a simplified substitute. The written result should reveal whether the constraint belongs to equipment capacity, installation detail, settings, or the operating process.
Use the written result to guide expansion. A new camera, device, or changed operating rule should inherit the same test standard only when the related power, network, storage, and scene assumptions still hold.
For sixteen 4K cameras, treat the final terabyte number as a measured range with headroom, not a promise derived from a label.