Dash Cam Emergency Files Filling the SD Card? Fix G-Sensor Settings
Charles Alexis
If your dash cam card keeps filling with “emergency” or “event” files and normal recording stops, the G-sensor is probably too sensitive.
What emergency files are
Dash cams record on a loop, overwriting old footage. When the G-sensor detects a jolt, it locks that clip so it does not get overwritten. These locked clips go into a separate folder, often called Event, Emergency or Protected.
That is useful when there is a real impact. The problem is when potholes, speed bumps and slamming doors all count as impacts.
Why this causes trouble
Locked clips take up space. Many cameras limit how much of the card can be used for them. When that area fills up, a few things can happen depending on the camera:
- New events stop being saved.
- Normal loop recording space shrinks.
- The camera beeps or shows a card full message.
- In the worst case, recording stops.
So the camera ends up doing the opposite of what you want: saving hundreds of pointless clips and then missing the one that matters. See our guide to dash cam not saving footage.
How to fix it
Lower the G-sensor sensitivity
This is the main fix. Most cameras have levels like low, medium and high, or a number scale. Start at medium or low. On rough roads, vans and minibuses, low is often right.
Test it for a few days. If you are still getting lots of event files with no real incidents, lower it again.
Set parking mode sensitivity separately
Many cameras have a separate sensitivity for parking mode. Here you often want it a bit higher, because a knock while parked is worth recording. But too high and wind or passing lorries trigger it.
Check the mounting
A camera that is loose on its mount, or mounted on a vibrating surface, will rattle and trigger the G-sensor. Make sure it is firmly mounted.
Clear old event files
Once you have changed the settings, back up any event files you need, then delete or format the card in the camera. See how often to format a dash cam SD card.
Use a bigger, better card
A larger high endurance card gives more room for both loop and event recording. Check the camera’s maximum supported size first. Our guide to the best SD card for a dash cam explains what to buy.
Does lowering sensitivity mean missing real crashes?
Not usually. A real collision produces a much larger force than a pothole. Even on low settings, a genuine impact will lock the clip. The aim is to stop the everyday bumps, not the real events.
If you are worried, you can always save clips manually. Most cameras have a button for this.
How fleets handle events
For one car, scrolling through event files is annoying. For a fleet, it is impossible.
With connected 4G dash cams, impact events upload automatically to a central dashboard, with location and speed attached. Thresholds can be tuned per vehicle type, so vans on rough sites are not flagging every bump. Fleet managers see real incidents, not noise.
You can see how that works on our connected dash cameras page. And if loop recording itself is confusing, our guide to dash cam loop recording explained is a good primer.
Summary
Too many emergency files means the G-sensor is set too high. Lower it, check the mounting, and clear the card. You will still catch real impacts.