The USB flash drives were first introduced in 1998. The popularity of USB drives has increased since then. The USB drive is actually a plug and play device used for storage purpose. USB drives use flash memory. The USB drives are so lightweight, that you can even attach it to a key chain. The popular names of USB drives are the keychain and flash drives. The USB drives are alternatives to the other storage devices like the compact disk, zip drive and floppy disks. These USB drives are easily compatible as the operating system of the computer recognizes the USB drive when it is plugged into the USB port. The operating system recognizes the USB drive by assigning a removable drive letter to it. The USB drives are compatible with both computers and digital cameras. These drives are very compact. To store data, the USB drive usually uses USB 1.1 or 2.0 interface.
The USB flash drives are the form of NAND type flash memory. This type of flash memory was developed for the purpose of transferring of data information. The NAND type memory has the new and latest technology to record huge amounts of data and also has fast writing/erasing speed. USB drive is composed of small circuit board which is sealed by a secure case made of metal or rubber. The purpose of the ssecure case is to protect the inner circuit board. It also has a serial bus connector.