From a structural standpoint, a standard USB mass storage device must support at least three endpoints: control, bulk-in, and bulk-out. The bulk-in endpoint handles data input and CSW status, while the bulk-out endpoint is responsible for data output and CBW commands. Each device is also required to have a serial number of at least 12 valid digits, enabling the host to generate globally unique identifiers for the device.
Fortunately, you can fix this issue and regain access to your storage. What Causes the "NAND USB2DISK Full" Error?
shows the drive with "No Media" and a capacity of 0 MB.
The reporting of a showing as "Full" (often despite being empty or having a 0MB capacity) usually indicates a low-level hardware or firmware failure where the device's controller has lost communication with the NAND flash chip . Core Causes