How long can a 32GB memory card last in a dash cam?
2 Answers
A 32GB memory card in a dash cam can record for approximately nine hours. Below is additional information about dash cams: Recording: The memory card must be for a single network camera. There are two recording methods: 24/7 continuous recording and motion detection recording (which only records when movement is detected). The duration of recording varies significantly between these two methods. Configuration: The length of recording is also affected by the configuration settings. If configured for high-definition full bitrate recording, it may only last a few days. To maximize recording duration, use motion detection recording and set the bitrate as low as possible. This can potentially extend the recording time to over 30 days.
As a car enthusiast who enjoys modifying vehicles, I often pay attention to the performance details of dash cams. The duration a 32GB memory card lasts in a dash cam largely depends on the settings: 1080p HD recording typically stores 3 to 4 hours of footage, but if you switch to 4K mode, the available space shrinks significantly, possibly lasting only about an hour, as higher resolution consumes more space per minute. The card itself has a loop recording feature, so old footage is automatically deleted without manual management, but limited storage time might cause you to miss recording some critical moments. I recommend choosing a U3 or higher-speed card to ensure stable writing without dropped frames, especially on bumpy roads where lag can be an issue. If you frequently use high-resolution settings, investing in a larger-capacity card like 128GB is more cost-effective to avoid insufficient recording during emergencies. Card quality also matters—low-quality cards are prone to failure, whereas branded cards I use can last several years.
