The string vid 346d pid 5678 serves as a perfect example of how the underlying technical standards of USB devices can have a direct impact on the real-world user experience. It represents a physical object—usually a Teclast or Intenso USB flash drive powered by a FirstChip controller. It is the key identifier for an active, ongoing Linux kernel bug that can corrupt data. Knowing this simple code provides you, the user, with the knowledge to avoid data loss and, if necessary, to find specialized tools for a last-ditch recovery effort.
A frequent anomaly reported with this controller is that a drive advertised at 32GB or 64GB suddenly errors out after 2GB or 4GB of write activity, or truncates its own size during operation. This is usually indicative of a low-grade memory die or bad storage blocks. You can run the free industry-standard verification tool to check for true physical block limits. Optimizing Performance: The exFAT Trick
Unbranded or white-label video capture hardware. How to Verify Your Device IDs vid 346d pid 5678
Run the proprietary MPTool software to rewrite the factory firmware block back onto the chip controller.
. Manufactured or exported under Chinese supply chains—frequently linked to Shenzhen SanDiYiXin Electronic Co., LTD —this specific combination of Vendor ID (VID) and Product ID (PID) represents low-cost storage drives using budget microcontrollers. The string vid 346d pid 5678 serves as
These drives often show better performance when formatted with exFAT rather than FAT32 or NTFS.
Plug the drive into a completely different computer running a different operating system version to see if the hardware ID remains static. 3. Uninstall and Reinitialize Drivers Knowing this simple code provides you, the user,
| Specification | Reported Value | | :--- | :--- | | | USB Mass Storage Device (Teclast CoolFlash) | | USB Version | USB 2.10 / USB 3.2 (Supports high speed) | | Controller Vendor | FirstChip (一芯) | | Controller Model | FC1179, FC3379 | | Flash Memory | Intel SLC or Micron TLC | | Write Speed | Generally performs slowly, often failing to exceed 30-40 MB/s |
Lightweight Linux live environments where the operating system reads primarily from the disk after a slow initial boot. troubleshooting steps