Dash cams are essential for recording road incidents, accidents, and unexpected events while driving. To ensure your dash cam functions properly, you need a reliable SD card capable of handling continuous recording, overwriting old footage, and withstanding extreme temperatures. Choosing the right SD card for your dash cam involves understanding speed classes, endurance levels, and storage capacities.
1. Why a High-Quality SD Card Matters for Dash Cams
Dash cams continuously record video footage, overwriting old files as needed. A standard SD card may not endure such demands, leading to failures, corrupted files, or missing recordings. A high-quality SD card ensures:
Reliable Recording Avoids skipped frames and corrupted files.
Longer Lifespan Withstands continuous overwriting.
Weather Resistance Functions in extreme temperatures.
Smooth Video Playback Prevents lag or glitches in recorded footage.
2. Key Features to Look for in a Dash Cam SD Card
A. Endurance Rating
Dash cams operate 24/7. so an SD card must handle constant reading and writing. Look for cards labeled as high endurance or industrial-grade to ensure longevity.
B. Storage Capacity
The ideal capacity depends on recording resolution and loop settings.
32GB – 1-2 hours of 1080p recording
64GB – 4-6 hours of 1080p recording
128GB – 8-12 hours of 1080p recording
256GB – 16-24 hours of 1080p recording
For 4K dash cams, opt for 128GB or higher to store sufficient footage before overwriting.
C. Speed Class
A fast SD card prevents lag and frame drops. Look for these speed classifications:
Class 10 (C10) – Minimum 10MB/s write speed
UHS Speed Class 1 (U1) – Minimum 10MB/s write speed (better for Full HD recording)
UHS Speed Class 3 (U3) – Minimum 30MB/s write speed (ideal for 4K recording)
V30. V60. V90 – Used in high-end cameras; V30 is suitable for dash cams recording in 4K.
For most dash cams, a U1 or U3 card is recommended.
D. Temperature Resistance
Dash cams operate in extreme temperatures, so an SD card should be heat-resistant, cold-resistant, waterproof, shockproof, and x-ray-proof.
E. Compatibility
Ensure the SD card is compatible with your dash cam. Some dash cams have a maximum supported capacity (e.g., 128GB), so check the manufacturer’s specifications before purchasing.
3. Best SD Cards for Dash Cams in 2024
A. Samsung PRO Endurance
Capacity: 32GB, 64GB, 128GB, 256GB
Speed Class: U3. V30
Lifespan: Up to 140.000 hours of recording
Best for: High-endurance performance in extreme conditions
The Samsung PRO Endurance is one of the most reliable SD cards for dash cams. It is built for continuous recording, offering high durability and extended lifespan.
B. SanDisk High Endurance
Capacity: 32GB, 64GB, 128GB, 256GB
Speed Class: U3. V30
Lifespan: 20.000 to 40.000 hours
Best for: Budget-friendly high endurance option
The SanDisk High Endurance is a cost-effective choice that supports continuous loop recording without failing prematurely.
C. Transcend High Endurance 350V
Capacity: 32GB, 64GB, 128GB
Speed Class: U3. V30
Lifespan: Up to 40.000 hours
Best for: Reliable performance in extreme weather conditions
The Transcend High Endurance 350V is designed for demanding applications like dash cams, security cameras, and body cams.
D. Lexar Professional 1066x
Capacity: 64GB, 128GB, 256GB
Speed Class: U3. V30
Lifespan: Moderate endurance
Best for: 4K recording with higher read speeds
The Lexar Professional 1066x provides excellent speed and reliability, making it suitable for dash cams that record at 4K resolution.
E. Kingston High Endurance microSD
Capacity: 32GB, 64GB, 128GB, 256GB
Speed Class: U3. V30
Lifespan: Up to 20.000 hours
Best for: Durable and weather-resistant performance
The Kingston High Endurance microSD is a solid choice for those who want affordability with reliable endurance.
4. How to Maintain and Format Your Dash Cam SD Card
A. Regular Formatting
To prevent corruption and errors, format your SD card every 2-3 weeks using your dash cam’s built-in formatting option or a computer.
B. Checking for Errors
Use tools like H2testw (Windows) or Blackmagic Disk Speed Test (Mac) to check for potential failures or bad sectors.
C. Avoid Cheap or Fake SD Cards
Counterfeit SD cards with falsely advertised capacities can cause recording failures. Buy from reputable brands and authorized sellers.
