The notion of pendrive or pen drive , alludes to one memory USB . It is a device that allows store digital data .
It should be noted that the idea of USB , acronym of Universal Serial Bus , refers to a bus : a common driver to different devices that allows the distribution of information. The pendrive, in this frame, is a secondary memory (also called peripheral memory or external memory ) that can be connected to a computer via USB.
The pendrive was born in the mid-decade of 1990 to replace the diskette , until then the most popular support for storing data. As its storage capacity and transfer rate increased, the pendrive increased its popularity and also competed against the resources that replaced the floppy disk (such as CD ROM and the DVD-ROM ).
It is important to keep in mind, however, that the elements mentioned resort to different technologies . In the case of the pendrive, it is a solid state drive that employs a non volatile memory (does not demand energy to conserve stored data).
Compared to CD or DVD, the flash drive is more resistant to dust and scratches. It is also smaller, which facilitates the transport of the information . As a point against, it is susceptible to voltage changes while connected.
Anyway, the theory indicates that a pendrive can be written about a million times and store the data for two decades. That's why today they are very popular for storing and moving office documents, photographs, music and other files.