How Long Can the BMW 3 Series Dash Cam Record?
3 Answers
With 1080P resolution for front and rear recording, a 32GB memory card can record for 6 hours; with 720P resolution, an 8GB memory card can record for 2 hours. Whether the recordings can be saved for a month depends on the capacity of the memory card; the larger the memory, the longer the storage time. Dash Cam: An instrument that records images, sounds, and related information during vehicle travel. After installing a dash cam, it can record the entire driving process of the car, including video images and sounds, which can serve as evidence in traffic accidents. For those who enjoy road trips, it can also be used to document the process of overcoming challenges. While driving, it continuously records videos, along with the time, speed, and location, functioning much like a "black box." It can also be used at home as a DV to capture life's moments or as a home surveillance device. Storage Time: To extend the recording storage time beyond a month, you can purchase a larger capacity memory card or set the video to a lower resolution to reduce the storage space required for each recording. However, this will decrease the clarity of the recordings, requiring the owner to weigh the trade-offs. Additionally, important video files can be locked to prevent them from being overwritten or deleted.
The recording duration of the BMW 3 Series dash cam mainly depends on two factors: memory card capacity and video settings. I use a 128GB card in my car, which can store approximately 10 hours of footage at 1080P resolution. 4K resolution occupies more space, reducing the recording time to about 6-7 hours. The dash cam defaults to loop recording mode, automatically overwriting old videos when the card is full, so there's no need to manually delete files. If you have a dual-channel model recording both front and rear, the recording time will be even shorter. For longer recording times, opt for a high-capacity, high-speed card—a 256GB card at 1080P is generally sufficient for a full day of long-distance driving. Remember to choose a card that supports hot-swapping for easy export of accident footage.
I've been driving a 3 Series for over two years, and the recording duration of the dashcam depends on the settings. Resolution has the greatest impact: 720P can store approximately 15 hours, while 1080P drops to 10 hours, and the currently popular 4K may only last 5-6 hours. The parking surveillance feature also consumes time, with time-lapse recording mode taking up 1-2GB of space per hour. I recommend choosing a card with at least 128GB capacity, as a 64GB card is prone to losing critical footage due to frequent overwriting during heavy rain. The loop recording logic is crucial—high-quality dashcams prioritize locking collision videos to prevent overwriting, and OEM models perform more reliably in this aspect.
