This was the era of the "expanded" or "fake" flash drive, and became the essential tool for the digital skeptic. The Illusion of Capacity

The software is typically a portable application and does not require installation.

MyDiskTest is considered an essential tool for consumers and technicians to verify the authenticity of hardware purchased from unverified vendors. By comparing the reported capacity against the actual physical storage available, it prevents data corruption that typically occurs when an expanded drive attempts to overwrite its own physical limits.

as the controller attempts to write data to non-existent memory addresses. Perform significantly slower than genuine products. How to Use Mydisktest