The "USB Mass Storage Device (NAND USB2DISK)" identifier is a red flag. It reveals that your USB drive is a generic, low-cost device—most likely from FirstChip—with no branding or quality control. While some of these drives work adequately for temporary file transfers, they are .
Press Win + X > Disk Management . Check if the drive shows "Unallocated" space. If it does, right-click to create a "New Simple Volume". Diskpart Clean: Open Command Prompt as Admin and type diskpart .
To understand Alex’s mistake, one must understand the nature of the . usb mass storage devicenand usb2disk full
According to Microsoft's Q&A, this identifier is . The hardware ID USBSTOR\Disk&Ven_NAND&Prod_USB2DISK indicates a generic, unbranded USB drive. Legitimate drives from reputable manufacturers (Sandisk, Kingston, Samsung, etc.) will show their own brand names instead.
If the tool reports missing or unmapped storage blocks, your drive is a fake. The hardware cannot safely hold data, and you should stop using it immediately to avoid data loss. Step 2: Refresh the Mass Storage Drivers The "USB Mass Storage Device (NAND USB2DISK)" identifier
A real-world case study: One buyer purchased a "2TB USB Drive" for a very low price. Using tools like and ChipGenius , they found:
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