Au87101a | Ufdisk

If the drive remains unrecognized, force Windows to reinstall the driver for that controller ID.

Still showing AU87101A? Try updating the driver manually:

Linux often ignores Windows' misreading of USB firmware.

Use tools that ignore the RAW file system and scan for raw data signatures.

How to use: Install the software on your C: drive. Run it against the AU87101A drive. Select "Raw Recovery" or "Deep Scan." Save recovered files to a different hard drive. au87101a ufdisk

If you’ve recently dug out an old USB stick, a no-name MP3 player from 2008, or a bargain-bin SD card reader that refuses to format, you might have run into two cryptic terms: AU87101A and UFDisk.

These aren’t viruses or random error codes. They are the ghosts of flash memory past.

In the world of low-level storage repair, the AU87101A chip and the UFDisk formatting tool are a legendary (if frustrating) duo. Here is what you need to know if you encounter them.

Seeing a cryptic code like AU87101A or “UFDisk not recognized” is frustrating, but it rarely means your data is gone forever. Start with the simplest fixes (different port, driver reinstall) before moving to advanced tools like ChipGenius. If the drive remains unrecognized, force Windows to

If you successfully recovered your drive using this guide, let us know in the comments which step worked for you. And if you have more details about what “AU87101A” refers to specifically (product link, manual, or brand), share it below — it could help others facing the exact same issue.

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Disclaimer: The code au87101a ufdisk is not a verified commercial product at the time of writing. This guide provides general troubleshooting for unknown USB device errors. Always back up data before attempting low-level repairs.

Q: Is AU87101A UFDISK a virus? A: No. It is a symptom of firmware failure. However, a virus can cause the corruption that leads to this error. Still showing AU87101A

Q: I ran the MPTool and now the drive is even smaller (e.g., 32GB became 8GB). Why? A: The MPTool detected bad blocks on your NAND chip and "blocked them out." Your drive's usable cells have degraded. It is time to buy a new drive.

Q: Can I fix this on a Mac? A: MacOS will also show the drive as unidentified. Use Disk Utility -> First Aid. If that fails, you must use a Windows PC for the MPTool, as MacOS does not support these low-level USB flashing utilities.

Q: Does this work for SD cards? A: No, "AU87101A UFDISK" specifically refers to USB flash drives. SD cards have different controllers (though they can also show generic errors like "Generic Storage Device").

Disclaimer: This process erases EVERYTHING—including the controller’s internal bad-block tables. Use on junk drives only.

Once you have revived your drive from the AU87101A state, keep it healthy: