GolamMostafa:
SD Card is a SPI driven device;HC05 is UART driven device.
This is probably the dumbest thread I have ever seen, but I deleted comment to that effect because I believe there might be an HC-05 available on a shield which can indeed run on SPI, and that may be what Crossroads was alluding to. It is probably a switchable option anyway, and only for use by the desperate. Don't ask why you would do that on a Mega....