Preparation: Backup any data if the drive is intermittently readable, as this process will perform a low-level format and erase everything.

Identify Your Chip: Before downloading, use a tool like ChipGenius or Flash Drive Information Extractor. These free utilities will tell you your "Controller Part-Number" (e.g., AU6989SN, AU6983).

The Alcor Micro Production Tool, commonly known as AlcorMP, is a service utility used by manufacturers to program and test flash drives before they hit shelves. For consumers, it serves as a powerful repair utility that can: Remove persistent write protection. Fix "Disk is not formatted" errors. Restore the original capacity of a drive.

Finding the correct version of AlcorMP is critical because these tools are version-specific to the controller chip inside your USB.

Look for "Online Recovery" Tools: Brands like Transcend offer their own simplified versions, such as the JetFlash Online Recovery tool, which is powered by Alcor technology but features a much friendlier user interface. How to Use AlcorMP to Repair Your USB

Optimization: Under the "Flash Type" or "Optimize" tab, ensure it is set to "Capacity Optimize" or "Speed Optimize" based on your preference.

Completion: Once the status bar turns green and displays "OK," unplug the drive and reinsert it. Windows should now recognize it as a fresh, healthy volume. Safety Tips and Troubleshooting