Microsoft cannot fix this drive. Diskpart cannot fix this drive. Only the factory Phison tool can reset the controller firmware.
Don't throw your drive away yet.
This article is designed to be a definitive guide, targeting users who own this specific drive (Silicon Power V3700 with the Phison PS2251-16 controller) and are searching for the best way to repair, recover, or reformat it. Stuck with a corrupted USB drive? If you own a Silicon Power V3700 (especially the 32GB, 64GB, or 128GB models) and your PC refuses to format it, you have likely landed on this page out of sheer frustration. formatter silicon power v3700 ps2251162 best
You have tried the standard Windows right-click format. It failed. You tried Disk Management. It froze. You tried CMD (Diskpart). It gave a "Disk is write-protected" error. Microsoft cannot fix this drive
| Rank | Tool Name | Best For | Success Rate (V3700) | | :--- | :--- | :--- | :--- | | | MPALL v3.71.00 | Standard 32GB/64GB V3700 | 95% | | 2 | ST-Tool v3.80.00 | Drives that show "0 MB" in Windows | 85% | | 3 | Phison Format & Restore v1.0.2 | Simple "Write Protect" removal | 70% | When to use ST-Tool (Alternative #2) If your Silicon Power V3700 shows as 0 bytes (Zero Bytes) in Disk Management, the controller is in "Boot Mode." MPALL cannot see it, but ST-Tool can. Use ST-Tool with the "Preformat" option to force the drive back to operational mode. When to use Phison Format (Alternative #3) If you just need to quickly remove write-protection but keep your data (rare), Phison Format & Restore is the best lightweight option. However, it does not fix bad blocks, so corruption will return quickly. Part 4: Common Errors and Solutions (Troubleshooting the Formatter) Even the "best" formatter can throw errors. Here is how to fix the most common codes on the Silicon Power V3700. Error Code: 0x1042 (Format Fail) Meaning: The flash memory has too many bad blocks. Solution: Open the settings and uncheck "Check Firmware Integrity." Lower the "Erase Cycle" count from 10 to 1. This forces the tool to accept a slightly degraded chip. Error Code: 0x1106 (Device not responding) Meaning: The driver is conflicting. Solution: Uninstall the USB drive from Device Manager. Run the ModeConverter tool (comes with MPALL) first to reset the USB ID. Then re-run MPALL. Error Code: 0x1094 (Invalid ISP) Meaning: You selected the wrong firmware file in MPALL. Solution: Do not manually select firmware files. Stick to the default "Toggle" or "Auto-Detect" setting. The Silicon Power V3700 uses Default ISP 2159-2162 . Part 5: Is the Silicon Power V3700 Worth Saving? Given the cost of a new 64GB USB drive is roughly $10-$15, you might ask: Is running MPALL worth it? Don't throw your drive away yet