when I use the sd card on the mega or the arduino uno it works. Everything is fine. However, when I use it in combination with the USB shield host it doesnt work. I know the usb shield host works because the LCD display works and the barcode reader works in it. It is not the sd card because the sd card works with the boards alone. It is only when I add the shield that there is a connection issue.
I get the error: Initialisation failed in the serial monitor. I tried writing it high but that didn't work.
WIRING: CS = 10 (I already tried digital 4) VCC to 5v
MOSI to 11 MISO to 12 and SCk to 13