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How long does a 128GB SD card last in a security camera?
The lifespan of a 128GB SD card in a security camera depends on several factors, including the video recording settings, the quality of the SD card, and the camera's recording schedule.
Video Quality & Resolution
Higher video quality (e.g., 4K) uses more storage space than lower resolutions (e.g., 1080p or 720p). For example, 1080p video may require around 4–6GB per hour of continuous recording, while 4K might require 15GB or more.
If a camera records at 1080p, it might record for 20–30 hours before the 128GB card fills up. If it records at 4K, the same card might only store around 10–12 hours of footage.
Recording Settings
Motion Detection: Many security cameras only record when motion is detected, so the SD card will last much longer because it’s not recording continuously.
Continuous Recording: If the camera records 24/7(Example:AOV Camera), the SD card will fill up faster compared to motion-based recording.
Loop Recording
Many security cameras are set to loop over old footage when the SD card is full. In this case, the card will continuously overwrite the oldest footage as it records new data.
Depending on the motion and the frequency of new events, the card could be in use for many months or years, as long as it doesn’t fail physically.
SD Card Durability
SD cards are rated for a certain number of write cycles (e.g., "endurance" cards are designed for heavy write-intensive use). Lower-quality cards may wear out faster, while high-endurance or industrial-grade cards are built to last much longer.
Estimating Lifespan
If the security camera records in 1080p resolution with moderate activity (e.g., motion-based recording), a 128GB SD card might last several months to over a year, depending on recording frequency and activity levels.
For continuous recording at 1080p, the card might last about 5–6 days before it starts overwriting the oldest footage.
For most security cameras, a 128GB SD card can last anywhere from a few months to over a year, with continuous recording eating up storage faster than motion-triggered recording. Be sure to use a high-endurance card to extend its lifespan.
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