Does this system record the sound also?

Yes, the system has built-in microphones for audio recording.

Can you add addition storage?

Yes, the system supports additional storage. It has one internal port and one external port, each supporting up to 6TB, for a total of 12TB maximum capacity.

Questions & Answers: Reolink 16CH 4K PoE Security Camera System, 16pcs 8MP IP Camera Human/Car Detect, IP66 Waterproof +1pc 16CH H.265 NVR Pre-Installed 4TB HDD (Include 16pcs 18M Cat5 Cables) - RLK16-810B16-A

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Reolink 16CH 4K PoE Security Camera System, 16pcs 8MP IP Camera Human/Car Detect, IP66 Waterproof +1pc 16CH H.265 NVR Pre-Installed 4TB HDD (Include 16pcs 18M Cat5 Cables) - RLK16-810B16-A

What's in the bundle: RLN16-410 *1pc + RLC-810-A *16pcs + Ethernet-18M *16pcs
4K Ultra HD Reolink 4K Ultra HD (8MP) PoE camera delivers almost 4 times the clarity of 1080p.
Person/Vehicle Detection Smart PoE IP cameras can identify people and vehicles in terms of their shapes, minimizing unwanted alerts such as animals or shadows.
Remote Access and Playback The free Reolink app allow you to access all your cameras remotely, no matter how many you have.
Plug and Play PoE System A simple PoE connection makes it easier to set up and install your home security camera system.
Continuous 24/7 Recording With a pre-installed 4TB HDD, users are provided with reliable 24/7 continuous recording and motion-triggered recording.
2-Year Warranty.

$1,839^.99 –