Keys USB are not another thing more than the good well-known Pendrive. It is a storage device, this means that it owns a flash memory, that allows to store great amount him of data and to conserve them even though it is not connected. He is extrable and it has a compact format, small and more and more practical, that it makes portable extremely. This memory USB is connected and disconnected of any equipment, is regrabable and worked exactly like any space of storage of its computer. It can keep until several gigas at the moment from data, with as much capacity, that up is very useful to conserve its archives in the form of back, and to protect important information surely. On the other hand, the last plates mothers are prepared to start with keys USB, this we can initiate an operating system from ours pendrive, using memory USB as disc. Extremely useful for those who want to recover the information of an enslaved disc without having to format it nor to particionar it, or for those users of free soft who wish to take their surroundings of work a where they go.
Often it happens, in the place of work and the home, that we needed to leave the computer ignited, but we do not want that another person has the possibility of acceding to the documents that we are using or the windows that we have open while we are absent. To extinguish or to suspend the computer is a valid option, but a little uncomfortable. If it has a memory USB, this task long ago simpler him, using his pendrive like key USB and the aid of a specific software to protect the privacy of his computer.