A dashcam’s repeated recording and overwriting can wear out its microSD card over time. That is normal for a device built to record continuously, but a degrading-card warning, recording failure, or recurring card error means you should act: save important footage, format the card using the camera maker’s instructions, and replace it with a compatible high-endurance card if problems continue.
Why dashcams wear out memory cards
Dashcams write footage continuously. When loop recording fills the card, the camera overwrites older clips with new ones, so the same storage is written to again and again. Flash memory has finite write endurance; that repeated workload can eventually degrade a card. Garmin puts it plainly: “All microSD™ memory cards wear out after they are overwritten a large number of times.” (Garmin)
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This wear is not, by itself, proof that the camera is faulty. But when a card becomes unreliable, recording may stop or footage may be lost. Treat warnings such as “memory card error,” “memory card is degrading,” or “SD card writing speed is too slow to record” as a reason to troubleshoot promptly. Garmin documents degrading- and slowing-card alerts, while Xiaomi has model-specific guidance for its slow-writing warning. (Garmin Support; Xiaomi Support)
What to do when an error appears
- Save footage you need. Copy important clips to another device before troubleshooting. Formatting removes the files stored on the card, so it is not a way to recover a lost clip.
- Format the card using the camera maker’s procedure. Formatting can resolve some recording and card errors. Follow the instructions for your camera rather than assuming the menus or procedure are the same across brands. VIOFO explains formatting and recommends it in its product guidance, but its advice does not establish a universal schedule for all dashcams. (VIOFO Support Center)
- Test whether the error returns. If recording stops again, the warning persists, or the camera reports the card is at the end of its useful life, replace the card. Garmin notes that a new card can also be defective or unsuitable for continuous high-endurance recording. (Garmin Support)
Choose a replacement the camera supports
Check the camera’s own compatibility information before buying. Supported capacity and minimum speed depend on the camera and sometimes the recording mode. For the Garmin Dash Cam models covered by its guidance, Garmin recommends quality Class 10 or higher cards; that recommendation should not be treated as a rule for every dashcam. (Garmin; Garmin compatibility guidance)
#1 Best Overall
- Compatible with Nintendo-Switch (NOT Nintendo-Switch 2)
- Ideal for dash cams and home monitoring systems
- Designed for high endurance so you can record for up to 20,000 hours with no worries (Actual hours of video saved less. Full HD (1920x1080) video only; total hours less for 4K UHD (3840 x 2160) video.)
- Built for and tested in harsh conditions; temperature proof, water proof, shock proof, humidity proof and magnet proof (Card only. See product packaging and official SanDisk website for more information and limitations.)
- Save more videos with capacities up to 256GB (1GB = 1,000,000,000 bytes. Actual user storage less.)
For continuous recording, look for a high-endurance microSD card that the camera manufacturer identifies as compatible. Xiaomi, for example, recommends a high-endurance card of “16G C10 or above” for the specified Mi Dashcam slow-writing warning. That is model-specific guidance, not a universal capacity or speed requirement. (Xiaomi Support)
- Confirm the camera supports the card’s capacity.
- Meet the speed class required for your camera’s recording mode.
- Prefer a model identified as suitable for high-endurance or continuous recording.
- Do not assume a particular brand or card will last a fixed number of months or years; the cited manufacturer guidance does not establish a comparable lifespan across models.
Reduce unnecessary recording and repeated overwrites
A larger supported card is overwritten less often and usually lasts longer, according to Garmin. If the dashcam is not connected to ignition-switched power, check whether it keeps recording when the vehicle is off. Garmin advises turning off some cameras between uses in that situation to avoid unnecessary recording. If parking recording is intended, review the camera’s power and recording settings so you understand when it is writing footage. (Garmin)
Quick Recap
Best Value
- EXTREME ENDURANCE FOR MONITORING DEVICES: Capture your crucial moments in high-resolution, even in harsh conditions; Engineered to deliver long lasting performance, the Samsung PRO Endurance SSD is a perfect fit for CCTV, dash cams and body cams
- BUILT TO LAST UP TO 140K HOURS OF RECORDING: With capacities up to 256GB*, the PRO Endurance records and rewrites up to 140K hours (over 16 years)**; Plus, with a warranty up to 5 years***, you can rest assured that your data endures
- RECORD & PLAY IN FHD/4K: PRO Endurance simplifies large file transfers with read/write speeds up to 100/40MB/s;**** Plus, FHD & 4K resolution support ensures that crucial moments are recorded in high-res so every detail is documented when it matters most
- CRITICAL DATA, SAFEGUARDED: After rigorous testing, it stands up against magnets¹, X-rays², water³, drop⁴, wearout⁵ and stays cool under pressure with operating temperatures ranging from -25°C to 85°C⁶
- WORLD'S #1 FLASH MEMORY BRAND: Experience the performance and reliability from the world's #1 brand for flash memory since 2003;****** All firmware & components, including Samsung's world-renowned DRAM & NAND, are produced in-house
Rank #4
- Designed with long-lasting endurance so you can record and re-record for up to 15,000 hours (for 32GB model)(1) (1) Actual hours of video saved less. Up to 120,000 hours/over 13 years for 256GB; 60,000 hours for 128GB; 30,000 hours for 64GB; and 15,000 hours for 32GB. Full HD video only; total hours less for 4K UHD video.
- Built for and tested in harsh conditions; temperature-proof, waterproof, shockproof and X-ray-proof(2) (2)Card only. See product packaging and visit the SanDisk Proof website for more information and limitations.
- Save more home security camera and dash cam footage with capacities up to 256GB1GB = 1,000,000,000 bytes. Actual user storage less.
- Record in Full HD and 4K(3) with Class 10, U3 and V30 video speed ratings(4) (3)Compatible device required. Full HD (1920x1080) and/or 4K UHD (3840x2160) video support may vary based on host device, file attributes, usage conditions and other factors. Visit the official SanDisk Video Knowledge Base website for more (4)UHS Speed Class 3 (U3) and UHS Speed Class 1 (U1) designate performance options designed to support real-time video recordingwith UHS-enabled host devices. Video Speed Class 30 (V30), sustained video capture rate of 30MB/s, designates a performance option designed to support real-time video recording with UHS-enabled host devices. Visit the SD Association website for speed class details information.
- 3-year limited manufacturer warranty (for 32GB model)(7) (7)Visit the official SanDisk website for warranty details.
Rank #3
- Ideal for dash cams and home monitoring systems
- Designed for high endurance so you can record for up to 5,000 hours with no worries (Actual hours of video saved less. Full HD (1920x1080) video only; total hours less for 4K UHD (3840 x 2160) video.)
- Built for and tested in harsh conditions; temperature proof, water proof, shock proof, humidity proof and magnet proof (Card only. See product packaging and official SanDisk website for more information and limitations.)
- Save more videos with capacities up to 64GB (1GB = 1,000,000,000 bytes. Actual user storage less.)
- Record and save more full HD or 4K videos (3) with capacities up to 256GB (Compatible device required. Full HD (1920x1080) and/or 4K UHD (3840x2160) video support may vary based on host device, file attributes, usage conditions and other factors.)
Rank #2
- [Ultra HD] Read/Write up to 100/60 MB/s. 4K Ultra HD video displaying/recording
- [Compatibility] Storage for Laptop, Tablet, PC, Smartphones, Camera, e-Reader. Files, Videos, Music
- [Environment] Waterproof, shockproof, temperature-proof and X-Ray proof
- [Cost-effective] 1 Micro SD Card, 1 Micro SD to SD Adapter, 1 Mini Case
- [Support] Gigastone 5-year limited warranty
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