Thank you, knut_ny, for clearing up the input question. So here are the 2 codes for the accelerometer and the SD module separately that I've previously used but how do I combine the two? Also, are there any condensed versions of these codes to just stick to the basics?
Accelerometer
// these constants won't change:
const int xPin = 2; // X output of the accelerometer
const int yPin = 3; // Y output of the accelerometer
void setup() {
// initialize serial communications:
Serial.begin(9600);
// initialize the pins connected to the accelerometer
// as inputs:
pinMode(xPin, INPUT);
pinMode(yPin, INPUT);
}
void loop() {
// variables to read the pulse widths:
int pulseX, pulseY;
// variables to contain the resulting accelerations
int accelerationX, accelerationY;
// read pulse from x- and y-axes:
pulseX = pulseIn(xPin,HIGH);
pulseY = pulseIn(yPin,HIGH);
// convert the pulse width into acceleration
// accelerationX and accelerationY are in milli-g's:
// earth's gravity is 1000 milli-g's, or 1g.
accelerationX = ((pulseX / 10) - 500) * 8;
accelerationY = ((pulseY / 10) - 500) * 8;
// print the acceleration
Serial.print(accelerationX);
// print a tab character:
Serial.print("\t");
Serial.print(accelerationY);
Serial.println();
delay(100);
}
SD Write
#include <FileIO.h>
void setup() {
// Initialize the Bridge and the Serial
Bridge.begin();
Serial.begin(9600);
FileSystem.begin();
while (!Serial); // wait for Serial port to connect.
Serial.println("Filesystem datalogger\n");
}
void loop() {
// make a string that start with a timestamp for assembling the data to log:
String dataString;
dataString += getTimeStamp();
dataString += " = ";
// read three sensors and append to the string:
for (int analogPin = 0; analogPin < 3; analogPin++) {
int sensor = analogRead(analogPin);
dataString += String(sensor);
if (analogPin < 2) {
dataString += ","; // separate the values with a comma
}
}
// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.
// The FileSystem card is mounted at the following "/mnt/FileSystema1"
File dataFile = FileSystem.open("/mnt/sd/datalog.txt", FILE_APPEND);
// if the file is available, write to it:
if (dataFile) {
dataFile.println(dataString);
dataFile.close();
// print to the serial port too:
Serial.println(dataString);
}
// if the file isn't open, pop up an error:
else {
Serial.println("error opening datalog.txt");
}
delay(15000);
}
// This function return a string with the time stamp
String getTimeStamp() {
String result;
Process time;
// date is a command line utility to get the date and the time
// in different formats depending on the additional parameter
time.begin("date");
time.addParameter("+%D-%T"); // parameters: D for the complete date mm/dd/yy
// T for the time hh:mm:ss
time.run(); // run the command
// read the output of the command
while (time.available() > 0) {
char c = time.read();
if (c != '\n') {
result += c;
}
}
return result;
}
I apologize in advance for sounding like a total Noob 
Yours truly,
Sara