What Size Memory Card Does a Dash Cam Need?
3 Answers
The memory capacity of dash cams currently includes options such as 8GB, 16GB, and 32GB. Here are some relevant details about dash cams: The function of a dash cam: A dash cam is a device that records images, sounds, and other related information during vehicle travel. After installing a dash cam, it can record the entire driving process in video and audio, providing evidence in case of traffic accidents. Choosing a dash cam: It is best to use a Class6 or higher memory card for a dash cam to ensure smooth video storage and avoid corrupted recordings. As a high-speed read-write device, dash cams have specific requirements for storage and read speeds. The Class rating is the current standard for measuring the speed of MicroSD cards, with levels including Class0, Class2, Class4, Class6, and Class10. For example, a Class2 memory card represents a minimum write speed of 2MB/s, and so on—the higher the number, the faster the write speed. It is best to use a Class6 or higher memory card for a dash cam to ensure smooth video storage and avoid corrupted recordings.
When it comes to the memory card for a dash cam, I often get asked about it. From a practical standpoint, the size depends on usage habits. 16GB is sufficient for most people, recording about two hours of 1080p video, which is fine for daily commutes. However, if you frequently take long trips or have parking surveillance, 32GB is safer, extending the coverage period and reducing the chance of important footage being deleted. High-definition or 4K resolution consumes more space, making 64GB or larger more reliable. I recommend choosing a Class 10 or UHS-I speed card to ensure smooth recording without lag. Don’t skimp and use too small a card, as it can fill up quickly and stop working; too large, like 128GB, may store too many useless files, wasting money. 32GB is the sweet spot, offering good value. Regularly format the card to maintain its lifespan—don’t wait until it fails to regret it.
I have experience calculating dashcam memory card usage. Assuming 1080p consumes about 100MB per minute, a 16GB card stores 160 minutes - sufficient for most short trips. For 4K recording, it starts from 200MB per minute, where a 32GB card only lasts 80 minutes; upgrading to 64GB becomes essential. Also consider loop recording sensitivity: higher sensitivity generates more files and consumes space faster. Parking mode requires larger capacity to ensure continuous coverage. I prefer 64GB cards for highway driving - they securely store a week's worth of old footage without worrying about missed recordings. Card speed must be at least UHS-I Class 3 to avoid frame drops. When budget allows, upgrade to larger cards as contingency for unexpected events.
