If the device is still not working:
Identify the real controller inside the USB drive using tools like ChipGenius or USBDeview. Once you know if it is an Alcor, SMI, or Phison chip, you can download the specific driver/firmware tool from: nand usb2disk usb device driver download
A: Likely a Windows Update replaced your driver. Reinstall the generic driver as shown in Part 3. If the device is still not working:
Windows Update includes a massive library of generic USB drivers. Identify the real controller inside the USB drive
Since there is no unique driver for “NAND USB2Disk,” you can force Windows to use the generic driver:
This works for 99% of cases and avoids any risky download.