While they both are very similar, there is one minor difference. They are used interchangeably, but there is a difference.
Thumb drives (also known as flash drives, memory sticks, pen drives) are data storage devices. They do use USB technology to make the data transfer easier. They specifically must have the “flash” memory, hence the name.
A USB drive is a smaller device that is removable and rewriteable. This is a broad term that can be used for any USB device to carry storage.
We offer both options in our store, so you can choose what makes the most sense for your needs.