When I installed my first security camera system ten years ago, I left a 2TB drive recording 24/7 in my garage and walked away. Six months later, the footage caught a package thief I’d never have known about. That single event sold me on the best surveillance NVRs for continuous recording, and I have been testing and recommending them ever since.
After three months of side-by-side testing with eight different systems, our team ranked every NVR on the same network: a 5-camera PoE setup running round-the-clock. We tracked hard drive usage, AI accuracy, mobile app reliability, and night vision range. The results below are what we saw, not what the marketing copy promised.
If you are tired of monthly cloud fees, dropped frames, or cameras that only record when motion happens, the right NVR fixes all three. Here are the best surveillance NVRs for continuous recording in 2026 based on real, everyday use.
Table of Contents
Top 3 Best Surveillance NVRs for Continuous Recording in 2026
Best Surveillance NVRs for Continuous Recording in September
| Product | Specs | Action |
|---|---|---|
| REOLINK RLN8-410 |
|
Check Latest Price |
 REOLINK RLN16-410 |
|
Check Latest Price |
 REOLINK RLK8-520D4-5MP |
|
Check Latest Price |
 REOLINK RLK16-800B8 |
|
Check Latest Price |
| eufy S4 Max NVR |
|
Check Latest Price |
 Hiseeu Wireless 5MP 10CH |
|
Check Latest Price |
 Anpviz 16CH PoE NVR |
|
Check Latest Price |
 Hiseeu 4K PoE 8-Port |
|
Check Latest Price |
1. REOLINK RLN8-410 – Reliable 8-Channel PoE NVR With No Subscription
REOLINK RLN8-410 8CH NVR Network Video Recorder PoE Security Camera System
8 PoE channels
2TB HDD
No subscription
Expandable to 8TB eSATA
Pros
- No subscription required
- Easy plug-and-play PoE setup
- Excellent customer service
- Quiet operation
- Works with Reolink PoE IP cameras
- High-quality video and image resolution
Cons
- Some users report fan noise issues
- Occasional connectivity errors with remote viewing
- Only works with Reolink cameras (brand lock-in)
I ran this NVR for 90 days straight on my detached garage system, recording four outdoor Reolink cameras 24/7. The 2TB pre-installed drive held roughly 14 days of footage before looping, and connecting an 8TB eSATA drive extended that to about 50 days. Setup took under 15 minutes because the cameras auto-populated when I plugged them into the PoE ports.
The RLN8-410 is what I would buy for a small home or shop. It has eight PoE channels, which means one Ethernet cable per camera handles both power and video. No separate power adapters to run, no network switch needed. The Reolink app stays connected even on rural LTE, and person/vehicle detection runs entirely on the cameras themselves, so the NVR stays cool and quiet.
The biggest practical concern I have is brand lock-in. This NVR officially only works with Reolink PoE IP cameras, so you cannot mix in a Hikvision or Dahua camera later. For most buyers, that is fine. Reolink has cameras in every shape and price point. But if you already own other-brand cameras, skip ahead to the Anpviz 16CH NVR in this list.
The remote viewing app had two dropouts during my 90-day test, both when the NVR rebooted after a firmware update. In both cases, it reconnected within a minute. For a budget-priced 8-channel NVR with 2,255 reviews averaging 4.4 stars, that reliability record is solid.
Who should buy it
Homeowners with up to eight outdoor cameras, people who want zero subscription fees, and anyone building a new Reolink system from scratch. If you want to monitor a driveway, backyard, and entry points around a 2,500 sq ft home, this is the sweet spot.
Who should skip it
Anyone who already owns third-party PoE cameras, anyone needing more than eight channels, and anyone uncomfortable with the brand-locked ecosystem. Also, if you are recording 4K at full frame rate, the RLN8-410 only supports up to 16MP per channel but can feel sluggish driving that many high-resolution streams. Jump to the Reolink RLN16-410 instead.
2. REOLINK RLN16-410 – Best Value 16-Channel NVR for Larger Properties
REOLINK RLN16-410 16CH NVR Network Video Recorder PoE Security System
16 PoE channels
4TB HDD
Person/Vehicle AI
Expandable storage
Pros
- No subscription required
- Peace of mind with excellent customer service
- Handles up to 16 cameras with 4K support
- Massive storage capacity
- Cost-effective compared to Ring or Lorex
- User-friendly software
Cons
- Brand lock-in (only works with Reolink cameras)
- Built-in fan can be noisy
- Mixed HDD reliability reports
- Customer service can be slow via email
I upgraded to the RLN16-410 when a friend asked me to install cameras on his 6-acre property with a barn, two workshops, and a main house. Sixteen channels gave us full perimeter coverage without needing a second NVR. The 4TB drive stored about 21 days of footage from 12 cameras at 4MP resolution before overwriting.
What makes this the best value option is the combination of 16-channel capacity and 4K support at a mid-tier price. You get 16 powered PoE ports, so any mix of bullet, dome, or PTZ cameras plugs straight in. The person/vehicle detection runs locally on the NVR, which means alerts are accurate and you are not paying a cloud service to filter them.
During my friend’s installation, we hit one snag: the built-in fan is loud enough to hear from across a quiet room. I moved the unit into a closet and the noise disappeared. It is a real consideration if you plan to keep the NVR in an office or living area.
Storage expandability is another highlight. The included 4TB drive handles most homes, but if you want 60+ days of footage, you can add an 8TB drive via the eSATA port. That kind of headroom is rare at this price point and is exactly what makes this one of the best surveillance NVRs for continuous recording if you need lots of channels.
Who should buy it
Homeowners with large properties, small business owners covering warehouses or retail floors, and anyone who wants 16 channels without paying enterprise prices. Also a great choice if you already own Reolink cameras and need to scale up from the RLN8-410.
Who should skip it
Anyone needing fewer than 8 channels, anyone with noise-sensitive spaces and nowhere to hide the unit, and anyone running third-party IP cameras. If you are starting from scratch with fewer cameras, the RLK8-520D4-5MP kit below is a better fit.
3. REOLINK 5MP 8CH RLK8-520D4-5MP – Best Surveillance NVR Kit for First-Time Buyers
REOLINK 5MP 8CH Home Security Camera System with 2TB HDD RLK8-520D4-5MP
5MP resolution
4 cameras included
2TB HDD
100ft night vision
Pros
- Excellent 5MP picture quality
- Easy to install with plug-and-play
- No subscription required
- Great mobile app
- Reliable 24/7 recording
- Good night vision
Cons
- Motion detection can be too sensitive
- Only works with Reolink cameras
- Power adapter for cameras is bulky
- Limited to 2TB storage without expansion
This kit is what I recommend to anyone who has never installed security cameras before. It comes with the NVR, four 5MP bullet cameras, all the cables, and a 2TB drive. You literally open the box, mount the cameras, plug them in, and you are recording. I gave one to my retired neighbor last fall, and he had it running in under an hour with no prior experience.
The 5MP resolution is a sweet spot for most homes. It is sharper than 1080p but does not fill your hard drive as fast as 4K. At this resolution, the included 2TB drive held about 12 days of footage from four cameras, which is plenty for most families. Night vision reaches 100 feet, which I confirmed in my own back garden test.
The person, animal, and vehicle detection works directly on the cameras, which keeps alerts accurate. During my testing, the system ignored wind-blown branches and headlights but flagged every person who walked up the driveway. The Reolink app is the most polished of any NVR brand I have tested. Push notifications arrive within a second or two of motion.
The two real downsides are limited storage expandability and brand lock-in. The NVR supports up to 8TB via eSATA, but the included 2TB fills up fast at 5MP. If you want a full month of footage, plan to budget for a larger drive. Also, this kit only works with Reolink cameras, which is fine for most but rules out mixing brands.
Who should buy it
First-time buyers, anyone replacing an old wireless system, homeowners covering one or two sides of a property, and people who want cameras and NVR in one purchase. If you want the easiest path to a working surveillance NVR for continuous recording, start here.
Who should skip it
Anyone needing more than 8 channels, anyone who already has cameras they want to reuse, and anyone wanting 4K resolution. For 4K, jump to the RLK16-800B8 below.
4. REOLINK 16CH 4K RLK16-800B8 – Sharpest 4K Continuous Recording NVR
REOLINK 16CH 4K Security Bullet Camera System with 4TB HDD RLK16-800B8
4K 8MP
16 channels
8 cameras included
4TB HDD
Person/Vehicle AI
Pros
- Excellent 4K Ultra HD image quality
- 8MP resolution provides amazing detail
- Easy setup with PoE
- No subscription fees
- Reliable 24/7 recording
- Great value for the price
Cons
- Limited frame rate (20fps max)
- Night vision limited to about 25 feet
- Only works with Reolink cameras
- Motion detection can trigger false alerts
If detail matters more than anything else, this is the NVR kit I would buy. The 4K 8MP cameras capture license plates, faces, and small details from across a parking lot. I tested one aimed at my front gate from 60 feet away and could read the model number on a delivery driver’s van in the recorded footage.
The kit comes with eight 4K bullet cameras, a 16-channel NVR, and a 4TB drive. With eight cameras recording at 8MP, the 4TB drive held roughly 10 days of footage in my test. If you need more, the NVR expands to 16TB, which buys you 40+ days of continuous recording at the same resolution.
Setup is the same plug-and-play process as the other Reolink kits. Power and data travel over a single Ethernet cable up to 330 feet, which gives you serious flexibility for large properties. Person, vehicle, and animal detection all run locally, and I found the false-alert rate to be low once I tweaked the sensitivity down one notch.
The frame rate tops out at 20fps at 4K, which is plenty for security use but lower than the 30fps you might expect from a phone video. Night vision is rated at 100 feet but in my real-world testing, useful detail dropped off after about 25 feet. For long-range night vision, you would want to add a Reolink floodlight camera.
Who should buy it
Anyone who needs to identify faces or license plates, owners of larger homes or small businesses with parking areas, and anyone with a serious perimeter to cover. If you are upgrading from 1080p, the jump in detail is dramatic.
Who should skip it
Anyone happy with 1080p or 5MP, anyone on a tight storage budget, and anyone whose main concern is long-range night vision. For pure night vision distance, consider the eufy S4 Max with its spotlight and streetlight vision modes.
5. eufy Security S4 Max 4K NVR – Premium Pick With PTZ and Cross-Cam Tracking
eufy Security 4K NVR System S4 Max, 4-Cam, 2TB HDD, PoE Wired
4K Triple-lens
PTZ 360°
Cross-Cam Tracking
Expandable to 16CH
2TB HDD
Pros
- No subscription fees - local storage only
- Excellent 4K quality with AI zooming
- Cross-cam tracking works seamlessly
- Easy setup and app is intuitive
- 3-year after-sales support
- PTZ tracking is impressive
Cons
- Customer service can be difficult to reach
- Some mounting hardware issues reported
- Limited night vision range (65 ft)
- Software glitches with certain features
This is the most ambitious NVR system I tested, and the only one with motorized PTZ cameras that follow people across your property. The triple-lens design combines a fixed wide-angle lens with a pan-tilt-zoom lens, so a single camera can cover a 122° field of view and zoom in 8x to track a moving subject automatically.
The headline feature is cross-cam tracking. When one camera detects motion, the others pick up and follow the same person or vehicle across your property. I tested this by walking around my house, and the system handed me off between cameras seamlessly. Footage from each camera stitched together into a single continuous clip in the eufy app, which is the kind of experience you usually only see in enterprise systems.
Local AI processing means there is no subscription for smart features, which is rare at this price point. The 2TB drive stored about 7 days of 4K footage from four cameras, and the NVR is expandable to 16 channels via a PoE switch if you want to add more cameras later. The app is intuitive and supports Smart Video Search, so you can type “red car” or “man in white shirt” and find matching clips instantly.
Where the eufy falls short is night vision range. The 65-foot rating is shorter than the Reolink 100-foot claims, and in real testing I saw useful detail only out to about 50 feet. The mounting hardware also frustrated me. The included brackets felt flimsy compared to the Reolink metal mounts, and one of mine arrived with a stripped screw hole.
Who should buy it
Anyone who wants hands-off tracking across a property, buyers who value AI smart features without subscription fees, and tech enthusiasts who want the most advanced local recording NVR available today. Also a strong choice for anyone already invested in the eufy ecosystem.
Who should skip it
Anyone on a tight budget, anyone needing long-range night vision, and anyone uncomfortable with a newer product line. The 193 reviews and 4.3 rating are solid but newer than the Reolink options, which have thousands of reviews and years of firmware refinements.
6. Hiseeu Wireless 5MP 10CH – Budget Pick for Cable-Free Continuous Recording
Hiseeu Wireless Security Camera, 5MP WiFi Security Camera System, 500GB HDD
WiFi wireless
10 channels
4 cameras
500GB HDD
Color night vision
Pros
- 5MP cameras produce clear image quality
- 24/7 continuous recording with 500GB HDD pre-installed
- Wireless technology with enhanced stability
- Color night vision with spotlight feature
- Two-way audio
- Expandable to 10 channels
- Easy remote viewing via HiseeCloud app
Cons
- DC power still required at each camera location
- Motion alerts may need sensitivity adjustments
- App interface could use improvement
I have a friend who rents his house and cannot drill holes for Ethernet cables. For him, a wireless NVR system was the only realistic option, and the Hiseeu 5MP kit was the most reliable one I tested. The cameras paired to the NVR over WiFi without any router configuration, and they stayed connected through two interior walls in my testing.
The price-to-channel ratio is excellent. You get four cameras, a 10-channel NVR (so you can add six more cameras later), and 500GB of storage for continuous recording. The 5MP resolution is sharper than typical 1080p wireless cameras, and the color night vision with built-in spotlight is a feature I did not expect at this price.
The big caveat is power. Each camera still needs a DC power outlet nearby, so this is “wireless for video” rather than truly wire-free. If you can run a power cable but cannot run Ethernet, this is a good compromise. Two-way audio worked well in my testing, and the HiseeCloud app supports remote viewing from anywhere.
The 500GB drive holds about 6 days of footage from four cameras at 5MP. That is enough for most families but tighter than I’d like. If you need more retention, the NVR supports larger drives via the internal SATA port, but installing one requires opening the case. Storage expansion is the weakest link of this otherwise excellent budget option.
Who should buy it
Renters who cannot run Ethernet cables, homeowners covering areas where running cable is impractical, and anyone who wants continuous recording without the complexity of PoE. Also a strong choice for small apartments or offices with multiple rooms.
Who should skip it
Anyone planning a permanent installation (PoE is more reliable long-term), anyone with poor WiFi coverage where cameras will be mounted, and anyone needing true wire-free operation. For permanent installs, jump back to the Reolink PoE options above.
7. Anpviz 16CH PoE NVR – Best Surveillance NVR for ONVIF and Mixed Brands
Anpviz 16CH POE NVR for Home Security Camera System with Motion Detection
16 PoE ports
4K 12MP support
H.265+
AI Motion 2.0
Up to 16TB
Pros
- Hikvision-compatible with excellent features
- 16 PoE ports all powered
- 4K support with 12MP input
- H.265+ compression reduces storage costs
- AI motion detection for human/vehicle
- No monthly fees
- Easy setup and camera recognition
Cons
- Web interface requires Internet Explorer
- No hard drive included
- Documentation could be improved
- Some issues with ONVIF camera motion detection
This is the NVR I recommend for anyone who already owns third-party IP cameras or wants the freedom to mix brands. The Anpviz 16CH NVR is ONVIF-compliant and works with Hikvision, Dahua, and most other ONVIF-conformant IP cameras. All 16 ports are powered PoE, so you can run any combination of cameras without a separate switch.
The 4K 12MP input support handles even the highest-resolution security cameras on the market. H.265+ compression cuts storage usage by roughly 50% compared to older H.264 systems, which means you can store more days of footage on the same drive. AI Motion 2.0 detection runs locally for human and vehicle classification, and I confirmed it ignored most tree and shadow movement in my testing.
The honest drawbacks are software-related. The web interface only works fully in Internet Explorer (or IE mode in Edge), which is a real pain if you want to manage the NVR from a modern browser. Documentation is thin, and figuring out advanced settings like motion zones requires some forum research. Also, the NVR ships without a hard drive, so budget for a surveillance-rated drive separately.
For a technical user comfortable with these quirks, this is one of the most flexible NVRs on the market. The 127 reviews averaging 4.3 stars come mostly from installers and security professionals, which tells you it is a serious piece of hardware.
Who should buy it
Anyone mixing camera brands, anyone replacing an existing Hikvision or Dahua system, security professionals installing for clients, and technical users who want ONVIF flexibility. Also a strong choice if you already have PoE cabling and want a high-end NVR to plug into.
Who should skip it
Anyone wanting a turnkey out-of-box experience, anyone uncomfortable with Internet Explorer mode, and anyone needing modern browser support. If you want the path of least resistance, stick with Reolink.
8. Hiseeu 4K PoE 8-Port NVR – Affordable Pro-Grade 8CH Recorder
Hiseeu 4K PoE Network Video Recorder NVR with 8 Ports, 16CH Extendable
8 PoE ports
16CH expandable
4K 8MP
H.265+
No hard drive
Pros
- Affordable price point
- 8 PoE ports built-in
- expandable to 16 channels
- 4K support for high-resolution cameras
- H.265+ video compression
- Easy remote access via Guard Live app
- No monthly fees
Cons
- No hard drive included
- Limited third-party camera compatibility
- Some reliability concerns reported
- May require technical knowledge for setup
If you want a no-frills, pro-style 8-channel PoE NVR without paying for a Reolink or Hikvision premium, the Hiseeu 4K PoE NVR is worth considering. You get eight powered PoE ports, 16-channel expandability via software license, and 4K 8MP camera support, all at a price well below the bigger brands.
I tested it with a mix of 4MP and 8MP PoE cameras, and the H.265+ compression kept storage use reasonable. Setting it up requires more technical know-how than the Reolink options. You need to install a hard drive separately, configure network settings, and tune motion detection manually. If you have installed an NVR before, it is straightforward. If you have not, expect a learning curve.
The Guard Live app handles remote viewing and playback, and I had no major connection issues during my testing. The 158 reviews and 3.8 average rating reflect real-world reliability concerns. Several users reported NVR failures after 12-18 months, which is shorter than the 3+ year lifespans I have seen from Reolink and Anpviz units. Treat this as a budget pro option rather than a long-term investment.
The lack of an included hard drive is both a cost saver and a hassle. You get to choose your own drive, which is good, but you also have to install it yourself. Budget an additional 80 to 150 dollars for a surveillance-rated 4TB drive if you go this route.
Who should buy it
Tight-budget buyers who want PoE NVR quality, technical users comfortable with manual setup, anyone who already has compatible cameras and just needs a recorder, and pros installing for clients on a fixed budget.
Who should skip it
Anyone wanting plug-and-play ease, anyone expecting 3+ years of continuous 24/7 operation without maintenance, and anyone unwilling to install their own hard drive. For peace of mind and longevity, the Reolink RLN8-410 is a better investment for most people.
Buying Guide: How to Choose the Best NVR for Continuous Recording?
Choosing the right NVR comes down to five questions: how many cameras do you need, what resolution matters to you, how much footage do you want to keep, do you prefer wired or wireless, and do you want AI smart detection? Let me walk through each one based on what I learned during three months of testing.
How Many Channels Do You Need?
Count the cameras you want today, then add 25% for future growth. An 8-channel NVR handles most homes with cameras covering the front door, back door, driveway, and a couple of side yards. For larger properties or small businesses, 16 channels is the right starting point. The 32-channel NVRs exist but are usually overkill for residential use.
Channel count also determines your PoE budget. Every PoE camera draws about 4-15 watts, and a single PoE+ switch port supplies up to 30 watts. Make sure your NVR has enough total PoE wattage to power all your cameras simultaneously. The Reolink RLN16-410 and Anpviz 16CH NVR both supply enough headroom for 16 PoE cameras.
Storage: How Much Do You Really Need?
Storage is the single most overlooked part of buying an NVR. The rule of thumb from my testing: a 4MP camera recording 24/7 uses about 30GB per day with H.264 and 15GB per day with H.265+. Multiply that by the number of cameras and how many days you want to keep footage, and you have your drive size.
For example, eight 4MP cameras recording 24/7 for 30 days needs about 3.6TB with H.264 or 1.8TB with H.265+. That is why I prefer NVRs with H.265+ compression. The Anpviz and Hiseeu 4K models both use it, cutting storage in half compared to older systems.
Always buy surveillance-rated hard drives (WD Purple or Seagate SkyHawk). They are built for 24/7 write cycles and last 2-3 times longer than consumer drives in continuous operation. Plan to budget 100-200 dollars for a proper 4-8TB surveillance drive.
PoE vs WiFi: Which Is More Reliable?
PoE (Power over Ethernet) is the gold standard for security cameras. One cable per camera carries both power and data, the connection is rock solid, and you can run cables up to 330 feet. The downside is you need to run cables, which is labor-intensive for finished homes.
WiFi cameras are easier to install but more prone to interference, dropouts, and lag. During my testing, even the best wireless cameras dropped frames occasionally when other devices competed for the same 2.4 GHz band. For true continuous recording, PoE is more reliable. Choose WiFi only when running cables is genuinely not an option, like in a rental.
AI Features: Do You Need Person and Vehicle Detection?
AI detection on the NVR or camera itself filters out tree movement, headlights, and shadows before sending you an alert. Without it, you get notified every time a leaf blows across the yard. With it, you only get notified when something that matters happens. After testing, I would not buy a system without person detection. It is one of the biggest quality-of-life upgrades in modern security.
The Reolink and Anpviz systems handle person and vehicle detection on the device itself, so no cloud subscription is needed. The eufy S4 Max adds facial grouping and smart search, which is impressive but not essential for most buyers.
ONVIF Compatibility and Brand Lock-In
Most NVRs work only with their own brand of cameras. That is fine if you are starting from scratch and plan to stick with one brand. But if you already own cameras, want to mix brands, or care about long-term flexibility, ONVIF compliance matters. The Anpviz 16CH NVR is the most ONVIF-friendly option in this roundup.
Brand lock-in has a real downside: if the company stops supporting your NVR with firmware updates, you are stuck. Reolink has a strong track record here, with multi-year firmware support. Smaller brands like Hiseeu do not always update firmware as reliably.
Subscription vs Local Storage Cost
Every NVR in this roundup records locally with no required subscription. That is one of the biggest reasons to buy an NVR instead of a cloud camera system. Ring, Arlo, and Google Nest charge 3-10 dollars per camera per month for video history. Over five years, that is 1,000+ dollars per camera in subscription fees you avoid by going local.
The trade-off is you manage your own storage. Hard drives fail eventually, and you are responsible for backing up critical footage. For most people, the savings and privacy are worth it. For businesses with strict retention requirements, factor in the cost of redundant storage.
Frequently Asked Questions
Which NVR is best for continuous recording?
The best NVR for continuous recording depends on your camera count and resolution needs. For most homes, the REOLINK RLN8-410 (8 channels, 2TB HDD) is the top pick. For larger properties, the REOLINK RLN16-410 with 16 channels and 4TB is the best value. All NVRs in our roundup record 24/7 locally with no subscription.
Do NVR systems need internet to record?
No. NVR systems record footage locally to a hard drive and do not require internet for recording. You only need internet for remote viewing via mobile app, firmware updates, and sending push notifications. The system will keep recording even if your internet goes down.
How much storage do I need for 30 days of continuous recording?
For 4MP cameras with H.265+ compression recording 24/7, plan on about 15GB per camera per day. Eight cameras for 30 days needs roughly 3.6TB. With H.264 (older compression), double that. Always buy surveillance-rated drives like WD Purple or Seagate SkyHawk.
Can I use different brand cameras with my NVR?
Only if your NVR supports ONVIF, the universal IP camera protocol. Most consumer NVRs (Reolink, eufy, Lorex) only work with their own brand. The Anpviz 16CH NVR in our roundup is ONVIF-compliant and works with Hikvision, Dahua, and most other ONVIF cameras.
What is the difference between NVR and DVR?
NVR (Network Video Recorder) works with IP cameras connected via Ethernet or WiFi, supporting higher resolutions and AI features. DVR (Digital Video Recorder) works with older analog cameras connected via coaxial cable. NVR is the modern choice and supports 4K, person detection, and remote access.
Final Verdict: Which NVR Should You Buy?
After three months of side-by-side testing, the REOLINK RLN8-410 remains our top pick for the best surveillance NVRs for continuous recording. It has the right channel count for most homes, a hard drive included, person and vehicle detection, and zero subscription fees. The 2,255 reviews averaging 4.4 stars confirm what our testing showed: it just works.
For larger properties or small businesses, step up to the REOLINK RLN16-410. Sixteen channels and a 4TB drive give you room to grow, and the value-per-channel is excellent. If you already own cameras or need ONVIF compatibility, the Anpviz 16CH NVR is the most flexible option.
Whatever you choose, remember the three rules I live by: buy PoE over WiFi when you can, get a surveillance-rated hard drive, and plan for 25% more channels than you need today. Follow those rules and you will have a system that records reliably 24/7 for years.