If you used an old or already heavily written card used on another Dashcam before, what could have been the cause of your new camera going dark or shutdown might have been one of these, very likely: (all 3 points were taken from Gemini, but verify on your own) High Write Amplification Factor (WAF) & Abrupt Power Loss: Dash cams continuously record small-block metadata and video index tables (FAT32/exFAT allocation table updates). Consumer card controllers lack firmware optimization for continuous streaming writes. Combined with sudden power cutoffs when turning off the ignition, the controller can suffer metadata corruption, forcing the card into permanent read-only lock regardless of remaining cell lifespan. (Gemini) Hot-Parked Thermal Stress & Charge Leakage: Even if the car is only driven 30 minutes a day, if it sits parked in direct sun or high ambient heat, where regularly reach 60°C to 80°C, a standard TLC/QLC floating-gate NAND will suffer accelerated data retention loss (charge leakage) at elevated temperatures when left un-powered. (Gemini) Unannounced Controller Lock: Consumer cards do not feature health-monitoring flags that communicate write-errors back to the camera. When a block fails, the card silently drops frames or corrupts the recording loop without triggering an error on the dash cam screen. (Gemini) I have at least 50-60 High endurance deployed between all CCTVs and all the cars we have. They all last years and never failed me. I learned the leason many years ago, that the normal cards would fail after weeks or few months.
