If the tool gets stuck at a specific percentage (e.g., 85% Scan), the NAND flash chip likely has severe hardware degradation. You can try changing the settings from a thorough Low-Level Format to a faster High-Level Format, though this may result in a slightly reduced final storage capacity.

To help me give you the exact version or settings for your repair, tell me:

Select if the drive just has a minor file system glitch.

Download a later 2023/2024 version of the FirstChip software. Severe physical damage to the memory pins or trace lines.

FirstChip系列主控在市场上非常常见，大量低价U盘（包括一些扩容山寨盘）都采用这款主控方案。对于这类U盘，使用通用修复工具往往无效，必须使用专用的FirstChip量产工具。

The box representing your flash drive will turn yellow and display a progress percentage. The software is now erasing the flash memory, rewriting the controller's firmware, checking for bad blocks, and building a brand-new file allocation table. 5. Finalize and Format

Do not use USB hubs or front-panel extensions. Connect directly to the back of the desktop computer.

Locate your device's corresponding slot number on the main screen matrix.

: Better firmware tuning to step up the read/write speed priorities for complex 3D NAND configurations.