Security camera not recording to SD card: how to fix it

Live video works, the camera looks healthy, and the playback timeline is empty. That combination is specific and it narrows things down fast, because live streaming and local recording are two separate jobs — one uses the network, the other uses the card.

Four causes account for nearly all of it: the card was never formatted inside the camera, the card is one the camera cannot use properly, recording is set to motion or schedule and never triggers, or loop recording already overwrote the footage you went looking for. Work through them in that order.

Step 0: make sure it really is not recording

Separate "nothing was recorded" from "I cannot find what was recorded" — the fixes have nothing in common.

Check the card status screen in the camera's storage settings. It should report a total capacity and how much is used. If it reports a capacity and rising used space, the camera is writing and your problem is finding the footage, not creating it. If it says no card, or shows zero capacity, you have a detection problem.

Check the date on the playback timeline. A camera with the wrong date or timezone files recordings under a day you are not looking at, which produces a convincingly empty screen — how playback and recordings work covers the navigation itself.

Check whether the camera was offline. Remote playback needs the camera reachable; local recording usually does not. A camera that lost its network may have been recording to the card the whole time — see what to do when the camera shows offline.

Cause 1: the card was never formatted in the camera

Memory cards come formatted for phones and computers, and a card that mounts fine in a laptop can still be unusable for continuous video writing.

Format the card from inside the camera's settings, not on a PC, whenever the option exists. That is the format the camera wants, and it clears anything left from the card's previous life.

Two warnings. Formatting erases everything on the card — copy anything you need first. And if formatting fails, or the card shows as unrecognised again a day later, the card itself is failing and reformatting will not save it.

Then verify. Come back in an hour or two and check the used space on the storage screen. If it has grown, the camera is writing. That single check is worth more than any amount of guessing at settings.

Cause 2: the card itself

Capacity

Maximum supported card size varies by model, and this is not something to assume from a general article or a marketplace listing. A card larger than the camera supports may appear to work, mount normally, and then fail or behave unpredictably once recording starts in earnest. Check the manual that came in your box, or ask the seller you bought from, before buying a large card.

Speed and endurance

A security camera writes video continuously or near-continuously, day after day, which is a much harder job than storing photos. Look for cards rated for sustained video writing — the Class 10 or U1 markings and above — and prefer cards sold for continuous recording or dashcam use, built for constant rewriting.

A card that is too slow does not always fail outright. It produces gaps: clips that stop early, recordings missing during busy periods, a timeline that looks moth-eaten rather than empty.

Counterfeit and worn cards

Fake-capacity cards are a persistent problem on open marketplaces. They report a large size to any device that asks, accept data happily, then fail silently once the real, much smaller capacity fills. The symptom fits this article exactly: recording works for a while, then footage stops appearing or comes back corrupted. Buy from a seller you can go back to.

Genuine cards also wear out. Continuous recording is one of the hardest workloads a card can face, so treat it as a consumable part and replace it when errors start rather than reformatting repeatedly.

Physical seating and environment

Push the card in until it clicks and check the orientation against the diagram by the slot. Never insert or remove a card while the camera is powered — it is a reliable way to corrupt it. On outdoor cameras, check the card door gasket is seated: moisture at the contacts causes intermittent failures that look exactly like a dying card.

Cause 3: the recording mode is not what you think

This is the cause people skip, and it explains most "the card is fine but there is nothing on it" cases.

Continuous recording writes all the time. Event or motion recording only writes when something triggers it. Scheduled recording only writes during set hours. And recording can simply be switched off, which happens more often than you would expect once someone else has been in the settings.

If the mode is motion-based, an empty timeline usually means the trigger never fired:

• Sensitivity set too low, so movement at a distance does not register.
• A detection zone drawn too small, or around the wrong part of the frame.
• A schedule that excludes the hours you care about, often left over from an attempt to reduce false alerts.
• Alerts configured without recording. Some setups notify you and record nothing, or record only to a cloud service that needs an active plan. If alerts stopped too, why notifications stop arriving covers the overlap.

One more motion-recording trap: unless the camera buffers a few seconds before the trigger, an event clip starts after the motion began, so the moment you wanted is missing from a clip that otherwise looks fine. Turn on the pre-record option if your camera has one; if it does not, only continuous recording guarantees you catch the start.

Cause 4: loop recording already overwrote it

Loop recording is normal and you want it: when the card fills, the oldest footage is deleted to make room. It only becomes a problem when you go looking for something older than your card can hold and conclude the camera stopped working.

How far back your card reaches depends on its size, the resolution and bitrate you record at, and whether you record continuously or only on events. Rather than calculating it, measure it: scroll the timeline back to the oldest recording that still exists. That date is your real retention window. Check it once and you will know whether an incident is still recoverable before you start troubleshooting.

To keep footage longer:

• Fit a larger card, within the size your model supports.
• Record at a lower resolution, or record the sub-stream if your camera offers one.
• Switch from continuous to event-based recording, accepting the pre-record trade-off above.
• Export the clips that matter soon after they happen, rather than trusting the card to hold them.

Local recording is also what lets a camera work without a subscription at all — if you are weighing that up, cameras without a monthly fee sets out what you keep and what you give up.

Cause 5: power, firmware and the clock

A smaller group of causes, but they explain the stubborn cases.

Unstable power. A camera that reboots mid-write corrupts the file it was writing, and repeated corruption damages the card's filesystem. If you keep reformatting the same card every few weeks, suspect the adaptor, the extension lead or the socket before blaming the card again.

Firmware. Storage bugs do get fixed in updates. Check for a firmware update in the camera settings, and let it finish without cutting power.

The clock. A camera with the wrong time or timezone records perfectly and files everything in the wrong place. Correcting the timezone often makes an apparently broken camera look repaired.

Factory reset, last. If the settings are genuinely tangled, resetting the camera gives a clean configuration — at the cost of pairing it again and redoing zones and schedules.

The checklist, in order

1. Open the storage screen and read the card status and used space.
2. Confirm the date, time and timezone on the camera are right.
3. Format the card from inside the camera, after copying anything you need.
4. Wait an hour or two, then check whether used space has grown.
5. Check the recording mode, schedule, sensitivity and detection zone.
6. Scroll the timeline to the oldest surviving recording to find your real retention window.
7. If the card is still not detected, try a different card of a size your model supports.
8. If cards keep corrupting, investigate the power supply; then update firmware, and reset last.

Model behaviour differs — supported card sizes, available recording modes, whether pre-recording exists, how formatting is presented. Treat the manual in your box and the place you bought the camera as the authority for your specific unit.

Frequently asked questions

Why does my camera show live video but not record anything?

Live streaming and local recording are separate functions, so one working tells you nothing about the other. The usual causes are a card never formatted inside the camera, a card the camera cannot use properly, or a recording mode set to motion or schedule that never triggers. Open the storage screen: if it reports a capacity and used space grows over an hour, the camera is writing and your problem is finding the footage instead.

What SD card should I use in a security camera?

Use a card built for sustained video writing — look for the Class 10 or U1 marking or better, and prefer cards sold for continuous recording or dashcam use, since a security camera writes constantly. Maximum supported capacity varies by model, so check your manual or ask the seller rather than buying the biggest card available. Buy from a seller you can return to, since fake-capacity cards fail in exactly this way.

Do I have to format the SD card before using it?

Yes, and format it from inside the camera rather than on a computer where possible, so the card is prepared the way the camera expects. Copy anything you need off the card first, because formatting erases it. If formatting fails, or the card becomes unreadable again shortly afterwards, the card is failing and should be replaced.

How many days of footage will my SD card hold?

That depends on the card size, the resolution and bitrate you record at, and whether you record continuously or only on events, so there is no single answer. The reliable way to find out is to scroll the playback timeline back to the oldest recording that still exists — that date is your actual retention window with your current settings. Check it before you need it, so you know whether an incident is still recoverable.

My camera says "no SD card" but the card is inserted. What now?

Power the camera down, remove the card and reseat it until it clicks, checking the orientation against the diagram by the slot. If it is still not detected, try formatting it inside the camera, and if that fails try a different card of a size your model supports. On outdoor cameras check the card door seal too, since moisture at the contacts causes intermittent detection failures.

Does the camera keep recording when the internet goes down?

On most cameras, writing to a local card does not depend on an internet connection, so recording usually continues while the camera is offline — you simply cannot watch it remotely until it reconnects. Recording does stop if the camera loses power, which is why an unstable power supply is a more serious problem than a dropped network. Confirm the behaviour for your model in its manual.

Stocking cards alongside cameras

Anyone selling or installing cameras learns this quickly: many "faulty camera" returns are card problems, and supplying a suitable card with each camera removes most of them before the customer calls. For supply and dealer terms, see the Yoosee partner information.