What is a Thumb Drive?
Thumb drive is another name for a USB flash drive.

More specifically, ThumbDrive (without a space) the name of one of the first brands of USB flash drives, and a claim to the first USB flash drive ever invented.
In 2000, at a trade fair in Germany, an obscure Singapore company called Trek 2000 unveiled a solid-state memory chip encased in plastic and attached to a Universal Serial Bus (USB) connector. The gadget, roughly the size of a pack of chewing gum, held 8 megabytes of data and required no external power source, drawing power directly from a computer when connected. It was called the ThumbDrive.
https://spectrum.ieee.org/thumb-drive (accessed 2025-01-15)
