Check the device physically for a model number (e.g., "MW-108" or "K520"). Leave that model number in a comment on the manufacturer's forum—it helps the next person searching for the "best" driver.
This guide is the ultimate, in-depth resource for everything you need to know about VID 346D and PID 5678, offering you the best practical advice available from user experiences and technical deep dives.
: Absolutely! The clear, consistent identification of this device makes it a perfect test subject for custom udev rules, hardware scripting, and learning how low-level USB identification truly works.
This is why you might be here: to fix a problem. The identifier VID 346D PID 5678 is most frequently found in online support forums, often from users experiencing similar issues. Here are the most common problems and their solutions. vid 346d pid 5678 best
: Often identified as Shenzhen SanDiYiXin Electronic Co., LTD .
Throughout your research, you will encounter the term (often abbreviated as "MPTools" or "量产工具")。 These are powerful, low-level utilities designed by chip manufacturers like FirstChip to initialize, format, and, essentially, reprogram a USB drive from the ground up.
Since these are typically generic drives, they are best suited for: Check the device physically for a model number (e
, "best" performance for this hardware varies by specific model and capacity: High Performance : Some 64GB versions (like the Kingston DTSE9H ) can reach read speeds of approximately 20-30 MB/Sec Variable Speeds
They generally offer modest sequential read and write speeds. While they are often marketed as USB 3.0 or 3.1, their actual throughput may be closer to high-end USB 2.0 speeds.
While one advanced user did find a potential key to the device's inner workings by briefly shorting two pins to access a "mode" that revealed a FC 3281C controller, this is an extremely risky, last-resort effort for data recovery when a drive is already dead。 : Absolutely
Many versions of this PID/VID combination use the rugged, capless metal casing characteristic of the Kingston SE9 series, which is highly resistant to physical damage but can get warm during long transfers. Community Feedback
Many "2TB" low-cost metallic drives bought online contain this exact combination. They are actually modified 8GB or 16GB chips running spoofed firmware that overwrites old data as soon as you pass its true physical limits.