now the developers of keil Uvision3 have provided a code for usb in which the memory that is accessed is created in the code itself....the board used is provided by keil itself that is the ARM& series (LPC2378).... now what i would like to know is how do i get the sd card to be accessed instead of the memory created in the code..there is a file on the sd card which i need to transfer to the computer...so i need the sd card to behave like a pendrive...the code that is provided does this wit that "FAKE" memory which contains a text file (.txt)...so can you please provide me with a code that does that or tell me what part of the provided code should i modify (with what?) to reach my goal??