It is incredibly frustrating. You are driving down the road, and suddenly you hear the familiar chime of your dashcam turning off, followed seconds later by it turning back on.
A few minutes later, it happens again. And again.
When your dashcam gets stuck in this "boot loop" or shuts down randomly, the natural instinct is to blame the device itself. Maybe the power cable is loose? Maybe the battery is dying? Maybe you bought a lemon?
Before you rip it off your windshield and demand a refund, stop. In 90% of cases, the dashcam is perfectly fine. The problem is the tiny memory card inside it.
Here is the truth about why SD cards cause dashcams to fail, and why the card you use in your phone is useless in your car.
The Misconception: "An SD Card is Just an SD Card"
This is the mistake everyone makes. We assume that a 64GB MicroSD card from a reputable brand will work equally well in a smartphone, a GoPro, and a dashcam.
This is false.
A smartphone only writes data occasionally (when you take a photo or download an app). A dashcam, however, is a data-writing beast. It is continuously recording high-definition video, overwriting old footage (loop recording), and doing it all while sitting under a blazing hot windshield.
Using a standard "consumer-grade" SD card in a dashcam is like trying to run a marathon in flip-flops. It might work for the first mile, but it will eventually fail painfully.
The Science: Why Dashcams "Kill" Cheap Cards
SD cards have a finite lifespan based on "write cycles." Every time data is written to the card, it physically wears down the memory storage cells slightly.
- Constant Stress: A dashcam never stops writing. A 4K dashcam like the Dylect Sense 4K Ultra pumps huge amounts of data onto the card every second.
- The Heat Factor: In India, internal car temperatures can hit 70°C. Standard SD cards are not built to operate reliably in that heat while under heavy load.
- The Failure Mode: When a standard card gets overwhelmed by speed demands, heat, or runs out of write cycles, it panics. It cannot save the current video file. To protect itself, the dashcam’s processor forces a reboot to try and reset the system.
The result: Your dashcam keeps restarting.
Other Symptoms of a Bad SD Card
Besides constant restarting, a failing or incorrect SD card will cause these issues:
- "Memory Error" Messages: The screen frequently flashes storage warnings.
- Missing Footage: You look for a video clip from yesterday, and it’s just gone.
- Corrupted Files: The video files are there, but they won't play on your computer.
- Recording Stops and Starts: The red recording dot keeps disappearing.
The Solution: What You NEED to Buy (The "High Endurance" Rule)
If you want your dashcam to work reliably, you must buy a specific type of card engineered for this abuse.
Do not just look for "Class 10". That is the bare minimum speed requirement, not a durability standard.
You need to look for two words on the packaging: "HIGH ENDURANCE" or "PRO ENDURANCE".
These cards are built differently:
- Better NAND Flash: They use higher-grade memory chips designed for thousands of hours of continuous recording.
- Heat Resistance: They are tested to survive extreme temperature fluctuations.
- Video Speed Class: Look for symbols like U3 or V30. This ensures the card can write fast enough for 2K and 4K video without choking.
Examples of suitable cards: SanDisk High Endurance, Samsung PRO Endurance, or Kingston Endurance.
A Note on Fake Cards
India is flooded with counterfeit SD cards sold online at unbelievably low prices. A fake "128GB" card might only have 8GB of real storage. When the dashcam tries to write past 8GB, it crashes. Always buy from reputable sellers.
Conclusion: Don't Bottleneck Your Security
You bought a dashcam for peace of mind. Don't let a ₹500 mistake render a ₹15,000 security device useless.
If your dashcam is acting strange, the very first step is to format the card inside the camera menu. If the problem persists, replace it immediately with a genuine High Endurance card.
Your dashcam will stop restarting, and you will actually have the footage when you need it most.
Explore our full range of dash cams here - Dylect Dash Cams