Devices with VID 346D and PID 5678 are typically USB 2.0 or 3.0 mass storage devices. Based on community benchmarks from platforms like NirSoft's USB Speed Test, performance varies significantly by brand:

USB Flash Drive Speed Tests - VID = 346d, PID = 5678 - NirSoft

If you encounter errors like "Please insert a disk" or "Unknown Capacity," these tools and methods are considered the best for recovery:

: For drives that are corrupted or showing incorrect sizes, the FirstChip MpTools (e.g., version V1.0.5.2) is the primary software for flashing the controller and restoring the true factory capacity.

: Users have reported that formatting these drives with exFAT rather than FAT32 can sometimes improve transfer bandwidth. Troubleshooting and Best Software