Make your own SD shield

// include the SD library:
#include <SPI.h>
#include <SD.h>

// Enable button at pin 6
const int Enable  = 6;
int Data_Counter = 0;

// Input buttons at pin 5, 4, 3
const int Input_1 = 5;
const int Input_2 = 4;
const int Input_3 = 3;

// set up variables using the SD utility library functions:
Sd2Card card;
SdVolume volume;
SdFile root;

const int chipSelect = 10;

// Create a file to store the data
File myFile;

void setup() {
  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  // Initialize inputs
  pinMode(Enable, INPUT);
  pinMode(Input_1, INPUT);
  pinMode(Input_2, INPUT);
  pinMode(Input_3, INPUT);

  // setup for the SD card
  Serial.println("Initializing SD card...");
 
  if(!SD.begin(chipSelect)) {
    Serial.println("initialization failed!");
    return;
  }
  Serial.println("initialization done.");
  Serial.println();

  //open file
  myFile = SD.open("DATA.csv", FILE_WRITE);

  // if the file opened ok, write to it:
  if (myFile) {
    Serial.println("File opened ok");
    Serial.println("Waiting for inputs");
    Serial.println();
    // print the headings for our data
    myFile.println("Entry,Input_1,Input_2,Input_3");
  }
  myFile.close();
}

void loop(void) {
  if (digitalRead(Enable) == 1) {
    // Write to terminal for debugging
    Serial.print("Reading data entry ");
    Serial.print(Data_Counter); // The first is 0
    Serial.println(":");
    Serial.print("Input_1 = ");
    Serial.println(digitalRead(Input_1));
    Serial.print("Input_2 = ");
    Serial.println(digitalRead(Input_2));
    Serial.print("Input_3 = ");
    Serial.println(digitalRead(Input_3));
    Serial.println(" ");
    // Write to SD card
    myFile = SD.open("DATA.csv", FILE_WRITE);
    if (myFile) {
      myFile.print(Data_Counter);
      myFile.print(",");
      myFile.print(digitalRead(Input_1));
      myFile.print(",");
      myFile.print(digitalRead(Input_2));
      myFile.print(",");
      myFile.print(digitalRead(Input_3));
      myFile.println(",");
    }
    myFile.close();
    Serial.println("Data written to SD");
    Serial.println();
    Data_Counter++;
    delay(5000); // 5000 = 5 seconds
  }
}