Do not run from a ZIP file. Extract to C:\Ufix-II\ (avoid spaces in folder names).
: The tool typically features a one-click "Recover" or "Restore" button to initiate the repair process. Performance and Reliability Ufix-ii Download
The tool will ask to install a “Filter Driver” or “USB Mass Storage Filter.” Click . Do not run from a ZIP file
| Error Message | Likely Cause | Solution | | :--- | :--- | :--- | | | Driver not installed / Windows blocked it | Re-disable signature enforcement | | “Read ISP fail” | Incorrect firmware version for controller | Identify the correct chip (e.g., Phison PS2251-07) and find matching firmware | | “Bad Block count > limit” | Physical NAND failure | Cannot be fixed; replace the drive | | “CRC Error in DBF” | Corrupted download file | Re-download from a different source | | “Timeout on CMD 0xEC” | Drive is in safe mode (pins shorted) | Requires hardware shorting method (advanced) | Performance and Reliability The tool will ask to
Backup any essential data, as the tool will erase everything on the drive during the repair process.
Ensure only the corrupted USB drive is plugged into the computer to avoid accidental formatting of other devices.
No. Ufix-ii is Windows-only. On Linux, you can try dd , lsusb , or usb-reset . On Mac, use Disk Utility’s “Erase” with zero data option.