Do not rely on the sticker on the USB casing. Open the drive carefully or use software:

If ChipGenius returns VID 058F PID 6387 or Controller: Alcor Micro AU6989SN-GTC / AU6998SN, you are in the right place.

Click Setup (usually a gear icon). Navigate to the Flash or Capacities tab.

The Alcor Micro USB Repair Tool is used for repairing, formatting, and configuring USB devices that utilize Alcor Micro chipsets. The tool can help resolve issues such as:

Alcor Micro Corp. is a prominent Taiwanese fabless semiconductor company specializing in USB flash drive controllers.

When a flash drive using these controllers fails (e.g., "Please Insert Disk" error, 0 bytes capacity, or write protection errors), it is typically due to firmware corruption or a mismatch between the controller and the NAND flash parameters. The repair tool re-flashes the firmware and reconfigures the controller parameters.

This report details the technical specifications and repair procedures for USB flash drives utilizing the Alcor Micro controllers AU6989SN-GTC and AU6998SN. These controllers are commonly found in generic, OEM, and branded USB storage devices. The focus of this report is on the "Mass Production Tool" (MP Tool), which is the primary software utility used to restore, format, and repair these devices when they become corrupted or unusable.