Use dd (Linux or WSL) to create a raw image of the NAND device:

In the world of hardware diagnostics and embedded systems, usb2disk is often a conceptual term for the direct data path used when flashing images or recovering drives. It refers to bypassing the high-level file system (Windows Explorer or Finder) and writing data directly to the disk blocks.

Seeing in your system notifications is rarely a death sentence for your data. In most cases, the drive is either:

The drive may be a that doesn't have custom branding in its firmware .

Understanding and Fixing the "USB Mass Storage Device NAND USB2DISK Full" Error

error, the computer is detecting the generic controller (the "USB2Disk" part) but cannot communicate with the NAND memory. Effectively, the computer sees the "reader" but not the "book." Common Causes of the Error How To Fix A USB Mass Storage Device Problem - Full Guide