Writing output from arduino to MMC crad ?

Hello, I am completly new to arduino cc. i wanted to do a project to interface accelerometer with a microcontroller and then to memory card. i thought the best way it can be done to start and test is using Arduino.

At the moment i have some knowledge of interfacing arduino using accelerometer, but as far as memory card is concerned, i do not have any idea about it.

I want to take the value of all the three axis from microcontroller and then write it to the memory card. basically, microcntroller will only write to the mmc card but not read.

I need help on writing to memory card from the microcontroller (Arduino), any kind of help wil be appreciated. Thanks