USB Flash Drive 闪存驱动器，其实也就是常说的U盘了。 (also known as Flash Drive, Thumb Drive, Pen Drives, or Jump Drives) is a removable flash memory storage device that attaches to a computer via USB. A thumb drive is portable memory storage. It is re-writeable and holds its memory without a power supply, unlike RAM. Thumb drives will fit into any USB port on a computer. They will also “hot swap,” which means a user can plug the drive into a computer and will not have to restart it to access the thumb drive. The drives are small, about the size of a human thumb - hence, their name - and are very stable memory storage devices.