Note the alphanumeric string. Look for VID_XXXX&PID_XXXX (e.g., VID_1221&PID_3234 or VID_ABCD&PID_1234 ).
Sometimes the driver loads properly, but Windows fails to assign a drive letter, making it invisible in File Explorer. Right-click the Start menu and select .
If the drive shows "No Media" or "0 Bytes," you may need to re-flash the controller firmware. .
Some low-cost or unbranded drives use this generic string as their default identity. Performance & Reliability Driver Nand Usb2disk Usb Device
A USB2Disk USB device is a type of portable storage device that uses the USB (Universal Serial Bus) interface to connect to a host device. These devices are also known as USB flash drives or thumb drives.
If Windows still shows “No Media” or the drive remains a “Nand Usb2disk Usb Device” without capacity, the controller’s internal firmware is corrupt. Recovery requires and a FirstChip MPTool .
Resolving this issue requires understanding its root causes. The error rarely stems from a missing Windows driver; rather, it indicates a failure within the USB device itself or how Windows interacts with it. Note the alphanumeric string
The Driver Nand Usb2disk Usb Device is a type of USB driver that enables communication between your computer and a USB device, such as a flash drive or external hard drive. The driver is responsible for allowing your computer to recognize and interact with the USB device, making it possible to transfer data and perform other operations.
⚠️ Reflashing firmware will completely wipe all data on the drive permanently. Only attempt this if you do not care about the data on the device.
Plug the drive into a completely different computer. If it works there, the issue lies with your original PC’s operating system. 2. Uninstall and Refresh the Driver in Device Manager Right-click the Start menu and select
Browse the database results to find matches that match your flash drive's capacity and controller model.
In this post, we’ll break down what this "NAND USB2DISK" entry actually is, why Windows struggles with it, and how to fix it in minutes.
Before attempting to rebuild the controller’s firmware, you should attempt to retrieve the drive letter using standard Windows tools. Do not format the drive yet; formatting will erase any remaining file allocation data.
Type list disk and press Enter to view all connected drives. Identify your USB drive by its size (e.g., Disk 1 or Disk 2).
Alternatively, download a diagnostic tool like or ChipGenius . Run the tool with your USB plugged in to view the exact Controller Part Number (e.g., Alcor Micro, Phison, Silicon Motion, or SMI) and flash memory type.