Hi @pb21.
To be more clear, it means you must use the SPI1 object defined by the Arduino "SPI" library. But yes, that is correct.
I think it will be easiest to use the "SdFat" library. You can install it using the Arduino IDE Library Manager. After installing it, you will find an array of example sketches that demonstrate the usage of the library under the File > Examples > SdFat menu in Arduino IDE.