How to Record Security Camera Footage 24/7: Continuous Recording Setup (2026)

A security camera that only records when it feels like it is not a security camera at all. Most camera failures are configuration failures, not hardware failures. A motion zone is set too small. A schedule stops at 18:00. An SD card fills up and silently stops writing. The fix is continuous recording, also called 24/7 recording. Every camera writes footage to disk around the clock, and old footage is overwritten automatically.

This guide shows you how to record 24/7 on an NVR, a DVR and SD card cameras. It also covers the storage math that tells you exactly how many days a drive will hold. The guide walks through recording modes, schedule setup, motion detection vs continuous recording and loop overwrite. It ends with the reliability checklist that keeps a site recording for years. No monthly fees are involved: everything here is local recording on hardware you already own.

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The Snapshot

• Continuous recording writes footage 24 hours a day with no gaps. A 4MP camera at 15 fps with H.265+ uses about 8-12 GB per day; the same camera on H.264 uses 18-25 GB.
• Motion detection typically cuts storage by 30-70% but risks missing slow, distant or blocked events. Many business sites record continuous and use motion only for alerts.
• A 256GB SD card holds roughly 21-32 days of 4MP H.265+ continuous footage, because 256 GB divided by 8-12 GB per day lands in that range.
• A 16-camera 4MP site keeping 30 days needs about 4-6TB of recorder storage with H.265+, plus 20% headroom on top.
• Loop overwrite is the setting that keeps 24/7 recording working forever: when the disk is full, the recorder deletes the oldest footage first.

What Does 24/7 Recording Mean?

24/7 recording means a camera writes video to storage continuously, around the clock, whether or not anything is happening in the scene. The recorder keeps a rolling archive. Newest footage goes in, and when the disk is full the oldest footage is deleted to make room. This is the mode behind the phrases "continuous recording", "24 hour recording" and "always recording" that appear on spec sheets and product listings.

Three terms are worth separating. Continuous recording is the general name for non-stop writing. Scheduled recording restricts continuous writing to chosen windows, such as business hours or overnight. Motion-based recording writes only when the camera detector triggers. A "24/7 recording camera" supports continuous or scheduled recording to an NVR, a DVR or a local SD card. No monthly fee is attached.

Why does continuous mode matter? Because the evidence you need is usually the footage from the moment nobody thought to look. A theft is noticed days later. A vehicle reverses into a gate at 03:40. An employee dispute refers to an incident between two motion events. With continuous recording the timeline is complete, and you can step back to any minute of any day. With motion-only recording, anything the detector missed is gone forever.

Full-color cameras make continuous recording more valuable at night. A full-color night vision camera records color in zero light using an F1.0 lens and built-in white light. The 24 hour recording archive stays readable after dark instead of becoming a series of grayscale shapes. For business sites this matters for insurance, disputes and police evidence.

Motion Detection vs Continuous Recording

The first decision in any recording setup is which mode each camera runs. The table below compares the two main options for a typical 4MP camera recording with H.265+.

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Continuous recording wins on evidence; motion detection wins on storage. A typical mixed scene records 8-12 GB/day continuously at 4MP with H.265+, while the same camera on motion-only might write 3-8 GB/day. That saving is real, but it comes with a structural risk: the detector decides what is worth keeping.

Detectors miss events for four common reasons. A person moves slowly, so the change between frames stays below the sensitivity threshold. A subject is far away and spans few pixels. A camera points through glass, and reflections mask movement. A vandal covers the lens, which produces no motion at all while the scene keeps recording empty frames. In each case continuous recording preserves the footage and motion-only does not.

The standard compromise is hybrid: record continuously at a low frame rate or low sub-stream, and let motion trigger high-quality main-stream clips plus alerts. The result is a complete timeline at modest storage cost, with instant notifications for events. For business sites, continuous or hybrid recording is the default recommendation; motion-only belongs on low-traffic cameras or battery-powered units.

Step 1: Set the NVR to Continuous or Timed Recording

The NVR is the most common recorder for IP cameras. Every NVR model exposes the same three controls: per-channel recording mode, a weekly schedule, and overwrite. The exact menu path differs by brand, but the logic is identical. Log in to the NVR web interface or local menu, open Storage or Record Settings, then open Schedule. Our NVR guide walks through the same screens in detail.

Set each channel to Continuous, sometimes labeled Always or 24H, and confirm the schedule covers all seven days. Some recorders default to Motion mode, which is why footage goes missing. A typical installer walks every channel and switches each one from Motion to Continuous before touching anything else. If the site needs business-hours-only retention, choose Scheduled and set the start and end times per day.

For cctv continuous recording on a busy site, use the main stream for storage and keep the sub-stream for remote viewing. Most NVRs record the main stream continuously and stream the sub-stream to phones. The recording indicator, a red dot or clock icon, should appear on every channel. A camera that shows no indicator is not writing.

Timed recording works on the same schedule grid. You can record 24/7 on critical channels and limit secondary cameras to overnight windows. Rule of thumb: any camera that watches money, doors or the perimeter should be continuous; cameras watching open yards can run scheduled. If you are selecting a recorder now, our NVR recorders ship with H.265+ enabled and schedules ready to configure.

Step 2: Configure DVR Schedule and Modes

DVR-based systems record analog or HD-over-coax cameras, including AHD, TVI and CVI. The schedule logic is the same as the NVR, with one extra step: pick the right compression first. Set the DVR to H.265+, or H.264+ on older models, before configuring the schedule, because compression decides how many days the drive holds.

Open the DVR menu, choose Record or Schedule, and select per-channel modes: Continuous, Scheduled, or Motion. For AHD systems the camera resolution is usually fixed at 2MP or 5MP over coax, and the recorder stores what the camera sends. A 2MP DVR channel at 15 fps with H.265+ uses roughly 4-6 GB/day; a 5MP channel uses 10-14 GB/day.

Many coax installations fail because the DVR default schedule stops recording when motion detection is off and the scene is calm. Check the schedule grid, and make sure it shows filled blocks for every hour you want covered. If you want the camera to record all day and all night, fill the whole grid or select the continuous preset.

DVRs also support loop overwrite, email alerts and timed holiday schedules. For a mixed site, a hybrid DVR accepts both coax and IP cameras, so you can migrate gradually. See our DVR and AHD guide for the coax side of the story, and browse our DVR recorders if you are building an AHD system.

Step 3: SD Card Recording and Capacity

Standalone cameras and some NVRs record to a microSD card. SD card recording is the simplest way to get local footage with no subscription, and it keeps working if the network drops. The catch is capacity: a card is much smaller than a recorder drive, so the retention window is short. The table below shows typical continuous recording days per card size for H.265+ cameras at 15 fps.

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A 256GB card is the practical sweet spot for a 4MP camera: roughly 21-32 days of continuous footage. Before buying, check the camera spec for the maximum supported capacity, which is often 256GB on budget models. A card larger than the camera supports is wasted money, because the camera will not format or address the full size.

Continuous writing is hard on cards. Choose a high-endurance microSD card rated for continuous video write. Format the card inside the camera, and enable loop overwrite so the card never fills and stops. Typical high-endurance cards are rated for years of 24/7 write; standard cards can fail within months under the same load.

SD cards are also a good second copy. Many cameras write to both the NVR and the local card, so a card failure or recorder theft does not destroy the only archive. For a site that needs local footage even when the recorder is down, SD recording on every camera is a cheap insurance layer.

24/7 Storage Math: GB per Day and Drive Sizing

The storage math for 24/7 recording is simple multiplication. Multiply GB per camera per day by the number of cameras and the retention days, then add headroom. At 4MP with H.265+, budget 8-12 GB per camera per day for continuous recording. H.264 roughly doubles that figure; 8MP roughly doubles it again. Use the table below to size a recorder drive for a 4MP H.265+ site.

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Drives report capacity in TB, but usable space is about 90% after formatting. Add 20% headroom on top of the raw total, because bitrate rises with scene activity, firmware updates and longer retention spikes. A drive that exactly fits the math will overflow in year one.

Retention policy is a business decision, not a technical one. Retail sites commonly keep 30 days; small shops settle for 7-14 days; a site under litigation or insurance review may need 90. Whatever the number, the same formula applies. A 4MP H.265+ camera uses 8-12 GB/day, so a 30-day policy needs 240-360 GB per camera before headroom. That is why 4MP with H.265+ is the workhorse of continuous recording: it balances detail, storage and night performance for most business sites.

Motion-only sites can use the same table with the motion figures, typically 3-8 GB/day at 4MP. For a full treatment of recording quality, bitrate and retention trade-offs, see our CCTV storage guide. The single most common sizing mistake is using H.264 bitrates for an H.265+ system, which over-buys storage by roughly 2x.

Loop Recording: How Overwrite Keeps the Disk Full

Loop overwrite, also called cyclic recording or auto-delete, is the setting that lets a recorder run forever on a fixed disk. When storage is full, the recorder deletes the oldest footage and writes new footage in its place. Without it, recording stops the moment the disk fills, which usually happens silently.

Enable overwrite on every recorder and camera that stores footage locally. In NVR and DVR menus it appears as Overwrite, Auto Delete or Loop Record. On SD cameras it is usually on by default. The retention window is then decided by drive size, not by any manual cleanup.

Loop overwrite has a consequence buyers should plan for: old footage is eventually gone. If the law, an insurer or a client requires 30 days of history, the disk must be sized for 30 days. Day 31 begins deleting day 1. A smaller disk quietly shrinks your retention promise.

For footage that must survive longer, copy it out: export clips to a NAS or cloud backup, or schedule the recorder to back up events. Recorders with RAID mirrors protect against a single failed drive. Retention math is the contract: GB/day times days equals disk size, and overwrite enforces that contract automatically.

Bandwidth, Power and Reliability for 24/7 Operation

Continuous recording changes the network picture. Every camera streams to the recorder all day, so the LAN must carry sustained bandwidth. A 4MP camera at 15 fps with H.265+ typically streams 2-4 Mbps; sixteen cameras need 32-64 Mbps sustained on the switch. Any modern 1 Gbps switch handles this, but Wi-Fi cameras and 4G uplinks may not.

Remote viewing is separate from recording. The recorder writes the main stream to disk. It serves a low sub-stream, typically 1-2 Mbps, to phones and browsers, so remote viewing does not add recording load. For sites that mix continuous recording with remote access, use a recorder with dual-stream output; it keeps the recording path and the viewing path independent.

Power is the second requirement. A camera that loses power stops recording, and a recorder that loses power stops everything. Put the NVR, DVR and PoE switch on a UPS with enough runtime to survive brief outages, typically 10-30 minutes. PoE switches deliver up to 15.4W per port on 802.3af; full-color cameras typically draw 5-12W each.

Two reliability settings matter for evidence. Set NTP time sync on the recorder so every timestamp is accurate, because a clock drift of minutes can sink a court case. And check recording health monthly: confirm the recording icon on every channel, spot-check random clips, and verify that overwrite is still enabled. A monthly 10-minute check is cheaper than explaining a missing week of footage. Buyers who want a matched setup can start with one of our CCTV kits, where cameras, recorder and drives are sized together.

Checklist for Business Buyers

When a buyer asks "how do I record 24/7", walk through this checklist in order. Each item prunes the configuration before the next one starts.

• 1. Choose the mode per camera. Continuous for money, doors and perimeters; motion or scheduled for low-traffic areas.
• 2. Set the schedule first. Fill the whole week or the exact business hours, and verify the grid on every channel.
• 3. Pick the compression before sizing storage. H.265+ everywhere the recorder supports it.
• 4. Compute GB/day from resolution. 2MP 4-6 GB, 4MP 8-12 GB, 5MP 10-14 GB, 8MP 16-24 GB at H.265+.
• 5. Size the drive with headroom. GB/day times cameras times days times 1.2, then round up to the next drive size.
• 6. Match SD cards to the camera. Check maximum supported capacity, use high-endurance cards, and enable overwrite.
• 7. Enable loop overwrite everywhere. A full disk that stops recording is a silent failure.
• 8. Protect power and time. UPS on the recorder and switch; NTP sync for accurate timestamps.
• 9. Verify monthly. Recording indicators, random clip review, disk health and free space.

24/7 Recording Questions Buyers Ask

The Bottom Line

24/7 recording is a configuration decision, not a hardware premium. Set every critical camera to continuous or scheduled mode, enable loop overwrite, size storage from H.265+ figures, protect power and time, and verify monthly. Continuous recording closes the gaps that motion-only systems leave open, and local storage keeps the archive free of monthly fees.

At FULLCOLORCAM we build full-color night vision IP cameras and recorders with local, no-subscription storage. The line-up includes 5MP F1.0 cameras, H.265+ NVRs and DVRs, and CCTV kits sized for your retention window. Every unit is tested before shipping, ONVIF-conformant and ready for 24/7 operation. Send your camera count and required retention days to cj226144@gmail.com for a storage-matched quote. We will tell you the drive size and recording mode your site actually needs, not the biggest spec on the price sheet.