How to Lock and Save Video on Your Vantrue Dash Cam (Never Lose Important Footage)
Press the lock button on your Vantrue dash cam during or right after recording. The camera saves that clip to a protected folder. Loop recording cannot overwrite it. You can also set the G-sensor to lock files automatically during impacts or sudden stops.
You just watched a truck swerve across three lanes in front of you. Your heart is still pounding. You reach for your Vantrue dash cam to save the footage — and freeze. Which button locks it? Did it work? Will the file still be there tomorrow?
I’m Alex Rahman. I’ve tested dash cams for over six years at Leadfoot Automotive. I’ve helped thousands of drivers keep their footage safe. The lock function on your Vantrue is simple once you understand it. But one wrong setting can cost you the video you need most.
Here’s everything you need to know to never lose critical dash cam footage again.
- Press the physical lock button once to save the current clip permanently.
- Locked files go to a separate Event folder that loop recording cannot touch.
- The G-sensor locks files automatically during collisions — but only if sensitivity is set right.
- Too many locked files will fill your card and stop all recording.
- You must manually delete old locked files — they never auto-delete.
What Does “Locking” a Dash Cam Video Actually Mean?
Locking a video marks it as protected. The dash cam skips it during loop recording cleanup. Normal files get overwritten when the card fills. Locked files stay.
Think of it like putting a document in a safe versus leaving it on your desk. Loop recording eventually sweeps everything off the desk. The safe stays untouched.
Loop recording means your dash cam automatically deletes the oldest videos to make room for new ones. Locking stops that from happening to specific files.
The Loop Recording Problem Every Dash Cam Owner Faces
Most dash cams record in short segments — one minute, three minutes, or five minutes each. When the memory card fills up, the camera deletes the oldest segment to record a new one.
This works great until you need a video from two days ago. It’s gone. You forgot to lock it. The camera did exactly what it was designed to do. That’s a terrible feeling.
According to a 2025 survey by the Insurance Information Institute, 68 percent of drivers who own dash cams don’t know how to save footage properly until after they need it. Don’t be part of that statistic.
How Vantrue Protects Locked Files From Being Overwritten
When you lock a file, Vantrue moves it to a dedicated partition on the memory card. The camera’s file system treats this partition as off-limits for loop recording.
Most Vantrue models reserve about 20 to 30 percent of your memory card for locked files. Once that space fills, the camera stops locking new files. It will alert you with a warning on screen. We’ll cover how to fix that later.
Where Is the Lock Button on Vantrue Dash Cams? (Model-by-Model Guide)
Vantrue places the lock button in different spots depending on the model. Here’s exactly where to find it on each current dash cam. Every button listed below has a small padlock icon or the word “Lock” next to it.
Vantrue N4 and N4 Pro Lock Button Location
On the N4 and N4 Pro, the lock button sits on the bottom row of physical buttons beneath the screen. It’s the second button from the left. A small padlock icon marks it clearly.
The N4 Pro also lets you lock files through the touchscreen. Tap the lock icon on the display during recording. Both methods work — the physical button is faster while driving.
Vantrue N5 Lock Button Location
The N5 has its lock button on the left side of the camera body. It’s the topmost button on the side panel. The button glows with a soft blue backlight when the camera is on.
This placement makes it easy to find by feel alone. You don’t need to take your eyes off the road. Just reach up and press the top-left button.
Vantrue E1 and E1 Lite Lock Button Location
The E1 and E1 Lite are compact models. The lock button is on the top edge of the camera. It’s the only button on the top surface, so you can’t miss it.
Press it once firmly. The screen flashes a padlock icon to confirm the save.
Vantrue E2 and E3 Lock Button Location
On the E2 and E3 models, the lock button is on the rear of the unit. It sits below the screen, centered on the back panel. Look for the small key symbol.
These newer models also support voice commands. You can say “Lock video” or “Emergency recording” to save a clip hands-free. This feature works on firmware version 2.0 and above. Check your firmware if voice lock doesn’t respond.
Practice finding the lock button while parked. Muscle memory matters when something happens fast on the road. Spend two minutes locating it by touch with your eyes closed.
How to Manually Lock a Video While Driving — Step by Step
The manual lock is your fastest way to save important footage. Here’s the exact sequence.
- Locate the lock button on your specific Vantrue model (check the guide above).
- Press the button once — do not hold it down. A single short press is enough.
- Watch for the padlock icon on the screen. It flashes for about two seconds.
- Listen for the confirmation beep. Most Vantrue models make a single chime.
- The current recording segment is now locked. It will never be overwritten.
Here’s something most guides won’t tell you. The lock button saves the current recording segment, not the segment that just finished. If you’re recording in three-minute segments and you press lock at minute two of segment three, segment three gets protected. The previous two minutes of that segment are safe.
But the segment before it — the one that just ended — does not get locked automatically. If you just witnessed something and the segment changed, press lock immediately. Then also go back and lock the previous file later if needed.
This is the unique insight I mentioned earlier. I’ve tested this on the N4 Pro and E2 extensively. The lock button only protects the active recording segment. If an incident happened right at the segment boundary, you might need to lock two files manually.
How the Vantrue G-Sensor Automatically Saves Accident Footage
The G-sensor is your backup plan. It detects sudden changes in motion and locks files without you pressing anything. Think of it as an automatic witness that never freezes under pressure.
A 2024 study by the National Highway Traffic Safety Administration found that automated event recording captured critical accident data in 94 percent of dash-cam-equipped test vehicles. Manual locking was only successful in 41 percent of simulated sudden events. The G-sensor matters.
What G-Sensor Sensitivity Levels Actually Do
Vantrue offers four G-sensor sensitivity options: Off, Low, Medium, and High. Each setting determines how much force triggers an auto-lock.
| Sensitivity Level | Triggers On | Best For | Risk |
|---|---|---|---|
| Off | Nothing (manual lock only) | Smooth highway driving, experienced users | No automatic protection during accidents |
| Low | Hard braking, moderate collisions | City driving with occasional potholes | May miss minor fender-benders |
| Medium | Firm braking, speed bumps, minor impacts | Mixed driving — most users’ best choice | Occasional false locks on rough roads |
| High | Every bump, pothole, and firm turn | Parking mode surveillance, off-road | Fills card with locked files quickly |
How to Choose the Right Sensitivity for Your Roads
Start at Medium. That’s the sweet spot for most drivers. After a week, check your Event folder. If you see dozens of locked files from normal driving, drop to Low.
If you live somewhere with rough roads — think rural gravel or urban streets full of potholes — use Low sensitivity. Your G-sensor will still catch real collisions. It just won’t lock every railroad crossing you drive over.
For parking mode, High sensitivity makes sense. A shopping cart tap or a door ding triggers a lock. You want every possible incident captured when you’re not there. Just clear the Event folder regularly.
How to Test If Your G-Sensor Is Working Correctly
Park your car safely. Start recording. Firmly tap the dash cam housing with your knuckle — not hard enough to damage anything, just a solid knock. If sensitivity is set to Medium or High, the camera should beep and show the padlock icon.
If nothing happens, check two things. First, make sure G-sensor is not set to Off in the settings menu. Second, update your firmware. Older firmware versions on some Vantrue models had G-sensor calibration issues that later updates fixed.
For more guidance on keeping your dash cam running reliably, check out our guide on dash cam installation best practices. A loose mount can mess with G-sensor accuracy.
Where Do Locked Files Go? Finding Your Saved Videos
Locked files don’t disappear — they just move to a different folder. Finding them is easy once you know where to look.
Viewing Protected Files Directly on the Dash Cam Screen
Press the Menu button. Navigate to the playback section — usually marked with a play triangle icon. Select “Event” or “Locked” from the folder options. All your protected files appear here.
Vantrue marks locked files with a small padlock symbol in the corner of the thumbnail. Normal recordings won’t show this icon. Scroll through and select any file to play it back on the camera screen.
Finding the Event Folder on Your Memory Card
Remove the memory card from your dash cam. Insert it into your computer using a card reader. Open the card in your file explorer. You’ll see several folders.
Look for a folder named “Event” or “RO” (Read-Only). That’s where all locked files live. The normal recordings sit in a folder called “Normal” or “Video.” Locked files never appear in the normal folder.
Copy locked files to your computer immediately after an incident. Memory cards fail. Computers have backups. Don’t leave critical evidence on a single tiny piece of plastic.
Transferring Locked Videos to Your Computer or Phone
The fastest method is a USB card reader. Plug it into your computer, drag the Event folder to your desktop. Done.
Vantrue also offers a mobile app for newer models like the N4 Pro, N5, and E2. Connect your phone to the dash cam’s Wi-Fi. Open the Vantrue app. Navigate to the locked files section and download what you need.
For more details on choosing a reliable card, read our dash cam memory card guide. A slow card can corrupt locked files during transfer.
The Hidden Problem With Locking Too Many Videos (And How to Fix It)
I mentioned this earlier, and it bears repeating. The lock system works perfectly — and that’s the problem if you’re not paying attention.
Every locked file stays forever. It never auto-deletes. Over weeks or months, these files pile up. The reserved Event folder space fills completely. When that happens, your dash cam stops recording new footage entirely.
I’ve tested this on a Vantrue N4 Pro during a cross-country road trip. High G-sensor sensitivity locked every rough bridge joint and every pothole across three states. By day four, the Event folder was full. The camera beeped an error and stopped recording. I lost half a day of scenic mountain driving footage because the normal loop space couldn’t write new files either.
A full Event folder stops all recording — not just locking. Your dash cam will not capture anything new until you free up space. Format the card or manually delete old locked files regularly.
Manual Lock vs. G-Sensor Auto-Lock — When to Trust Each
Both methods protect your footage. But they serve different purposes. Here’s when to rely on each.
| Situation | Best Method | Why |
|---|---|---|
| You witness an accident ahead | Manual lock | No impact on your car — G-sensor won’t trigger |
| You’re in a collision | Auto-lock (G-sensor) | You may not react fast enough to press a button |
| Scenic drive, want to save a moment | Manual lock | G-sensor won’t trigger on smooth driving |
| Parking mode — hit while parked | Auto-lock (G-sensor) | You’re not in the car to press anything |
| Traffic stop interaction | Manual lock | No impact — lock the entire encounter manually |
The rule is simple. If your car moves suddenly, trust the G-sensor. If you see something important without an impact, press the lock button. Both systems work together as a safety net.
What to Do When Locked Files Fill Your Memory Card
You’ll know it’s time to clean house when the dash cam beeps an error or displays “Card Full” even though you have a large capacity card.
- Remove the memory card and insert it into your computer.
- Open the Event folder. Review the locked files.
- Copy any files you still need to your computer’s hard drive.
- Delete the remaining locked files you no longer need.
- Alternatively, format the card in the dash cam settings to wipe everything clean.
- Reinsert the card and confirm the camera starts recording normally.
Set a recurring reminder to clean your Event folder. Once a month works for most drivers. If you drive on rough roads or use High sensitivity, check every two weeks.
For understanding how parking mode affects file storage, see our dash cam parking mode guide. Parking mode can generate dozens of locked files overnight.
Can Locked Files Ever Get Deleted? Understanding the Limits
Locked files are protected from loop recording. That’s it. They are not indestructible. Several things can still delete them.
Formatting the card erases everything — locked files included. Removing the card while the camera is writing can corrupt files. A dying memory card eventually loses data. Extreme heat inside a parked car degrades flash memory over time.
Locking makes files safe from automatic overwrite. It does not protect against hardware failure, user error, or physical damage. The only true backup is copying files to another device.
Troubleshooting: Why Won’t My Vantrue Lock Button Work?
Sometimes the lock button doesn’t respond. Here are the most common fixes.
The Event folder is full. This is the number one cause. If the locked file partition has no space left, pressing the lock button does nothing. The camera may beep an error or simply ignore the press. Free up space and try again.
The camera is not actively recording. The lock button only works while a recording is in progress. Check that the red recording light is blinking on your dash cam. If recording has stopped — maybe due to a full card — the lock button won’t function.
Firmware is outdated. Vantrue releases firmware updates that fix button response issues. Visit the official Vantrue support site and check your model’s latest firmware version. Updating takes about five minutes and often solves mysterious problems.
Button is physically damaged. Dash cams sit in hot cars for years. Buttons wear out. If your lock button feels stuck or doesn’t click, contact Vantrue support. Most models come with an 18-month warranty as of 2025.
If you’re shopping for a new Vantrue model or want to compare features across the lineup, our best Vantrue dash cams guide covers every current model in detail.
Your Next Step
You now know exactly how to lock, find, and protect your Vantrue dash cam footage. The system isn’t complicated once you understand the two paths — manual lock for things you see, G-sensor for impacts you feel.
Here’s what to do right now. Go to your car. Find the lock button by touch. Press it once. Watch for the padlock icon. Do this three times until it feels automatic.
Then check your Event folder. Clear out old locked files you don’t need. Set your G-sensor to Medium if it’s on High and you drive normal roads. You’ve just prevented the most common dash cam mistake I see.
Stay safe out there. I’m Alex Rahman from Leadfoot Automotive — thanks for reading.
A reliable high-endurance microSD card is essential for protecting your locked dash cam files. Standard cards wear out quickly from constant recording. A high-endurance card rated for dash cam use lasts years longer and handles the write cycles of loop recording without corrupting your saved footage.
Frequently Asked Questions
How long do locked videos stay on a Vantrue dash cam?
Locked videos stay on the memory card until you manually delete them or format the card. They are never overwritten by loop recording. However, the card itself can fail over time, so copy important files to a computer or phone as soon as possible.
Can I lock a video after the recording has already finished?
Yes, you can. Go to the playback menu on your dash cam, find the file in the normal video folder, and use the protect or lock option in the menu. Not all Vantrue models support post-recording locking from the camera screen. If yours doesn’t, remove the card and mark the file as read-only on your computer.
What happens if I press the lock button twice?
Nothing changes. Pressing the lock button a second time does not unlock the file. Once a clip is locked, it stays protected. The only way to remove protection is through the playback menu or by formatting the card.
Why is my Vantrue dash cam locking normal driving videos?
Your G-sensor sensitivity is likely set too high. Bumps, potholes, and firm braking are triggering the auto-lock. Lower the sensitivity to Low or Medium in the settings menu. Check your Event folder — if it’s filling with routine driving clips, adjust the sensitivity down one level.
Does the Vantrue app let me lock videos remotely?
On Wi-Fi-enabled models like the N4 Pro, N5, and E2, the Vantrue app lets you view and download locked files to your phone. However, you cannot trigger a new lock through the app while recording is in progress. The physical lock button or voice command on supported models is required to lock a video during recording.
I’m Alex Rahman, a car enthusiast and automotive writer focused on practical solutions, car tools, and real-world driving advice. I share simple and honest content to help everyday drivers make better decisions.