Symptoms
- App shows an SD card error or 'card not detected' message
- Recordings stop even though the card has free space
- Card fills up faster than expected
- Card was working, then suddenly errors out
Likely causes
- CommonSD card is full and old footage isn't being overwritten correctlyA corrupted file system can prevent the camera from properly cycling out old recordings.
- CommonSD card not rated for continuous video recordingMany cameras require a card rated for surveillance or high-endurance use, not a basic consumer card.
- PossibleSD card corrupted from repeated power loss during writesSudden power cuts while the camera is writing to the card can corrupt the file system over time.
- PossibleSD card slot contacts dirty or card not fully seatedA loose or dirty connection can cause intermittent read/write errors.
- Less commonSD card reaching end of its write-cycle lifespanConstant overwriting eventually wears out flash memory, especially on lower-endurance cards.
What to do
- Check the SD card's rated capacity and speed class against the camera manufacturer's requirements.
- Format the SD card from within the camera's app rather than a computer, since the camera formats it in the required file system.
- Power off the camera, remove the card, and check that the contacts are clean and it's fully seated when reinserted.
- If errors continue, test with a new SD card rated for continuous surveillance recording.
- Ensure the camera has stable, uninterrupted power to avoid corrupting the card during writes.
- Check the camera's storage settings for overwrite/loop recording enabled so old footage clears automatically.
- Replace the SD card outright if it's several years old or has been through many overwrite cycles.
Tools and parts
- SD card reader (optional, for checking on a computer)
High-endurance microSD cardSearch: “high endurance microSD card for security camera”
When to call a pro
If a new, properly rated card still shows errors, the camera's SD card slot itself may be faulty and need manufacturer service.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.