What is the reason why the car cannot read the SD card?
2 Answers
It may be due to dirt on the metal area of the SD card. Below is the relevant introduction: Car-mounted: The so-called car-mounted refers to products specifically designed for use in cars, making them convenient for use while the car is in motion. The most common examples include car-mounted MP3, MP4, GPS, car-mounted DVD, car-mounted hard drive, car-mounted power supply, car-mounted refrigerator, car-mounted massager, car-mounted computer, car-mounted TV, car-mounted hard drive, car-mounted air purifier, car-mounted USB video recorder, etc. Car navigation: In recent years, the development of car navigation systems has been very rapid. Currently, people can not only choose a navigation system as an optional configuration when purchasing a new car but also install the device on an existing car. You can even configure a portable satellite navigation system, placing it in whichever car you drive or taking it along for outdoor adventures or mountain climbing.
I recently encountered an issue with the SD card not being readable while tinkering with the car's infotainment system, which could stem from multiple causes. Poor quality or physical damage to the SD card itself is common. I tried checking it with a card reader—if it couldn’t be read on a computer, the card was likely faulty. The file system format is also crucial; most car devices require FAT32, so using exFAT or NTFS can cause errors. Reformatting to standard FAT32 often resolved the issue for me. Poor contact in the card slot, due to dust buildup or oxidation, shouldn’t be overlooked either. Regular cleaning of the slot and the card’s metal contacts helped improve connectivity. Compatibility issues are another factor—high-capacity SD cards (e.g., 128GB or larger) or high-speed cards might not be supported by the system, so trying a smaller-capacity card could work. System software bugs can also cause this; updating the car’s firmware sometimes restored normal reading functionality. I recommend regularly backing up data to avoid losing important files if the card fails.