The invention relates to a device and method for providing data exchange and storage. The said device includes a controller module (62) which includes a firmware for controlling operation of each modules in the said data exchange and storage device (60) and performing data processing and information exchange; and an internal storage module (61) for storing data under controlling of the said controller module (62); and a system interface (63) module connecting with system interface and performing data exchange with the said data processing system (10) under controlling of the said controller module (62); and an external storage interface module (64) connecting with external storage equipment and performing data exchange with the external storage equipment under controlling of the said controller module (62). The device can accomplish connection with data processing system of various type interfaces and external storage equipment of various type interfaces. The device can also implements function that the data processing system access to the interior storage module and the external storage equipment, thereby the device of invention can be named an individual moveable storage center for users.