                 break;
             }
             break;
-          case 3: //Case 3 displays GPS altitude data if the GPS is enabled
+          case 3:
+            if (buf[7]) { //Datum 7 is the SD-working flag
+              lcd.print("SD Recording:");
+              lcd.setCursor(0, 1);
+              lcd.print("Working");
+            }
+            else {
+              lcd.print("SD Recording:");
+              lcd.setCursor(0, 1);
+              lcd.print("Failure");
+            }
+            break;
+          case 4: //Case 4 displays GPS altitude data if the GPS is enabled
             if (buf[5] == true) {
               if (gpsFix == 0 || gpsQuality == 0) {
                 lcd.print("No GPS fix.");

      if (rf95.recv(buf, &len)) //Fills 'buf' with data, returns false if an error occurs
      {

      lastRxTime = millis();

        union { //Memory union used for the majority of data processing
          uint8_t tempBuff[3];

        }

        //Once data to the LCD have been displayed, update the LEDs with appropriate data
        if (buf[2] == 1) //Confirmation of the Fin Override Flag
          digitalWrite(finOverLED, HIGH);
        else
          digitalWrite(finOverLED, LOW);

        if (buf[3] == 1) //Confirmation of the Servo Power Flag
          digitalWrite(finOnLED, HIGH);
        else
          digitalWrite(finOnLED, LOW);

        switch (buf[6]) { //Reports fin-position data
          case LEFT:
            digitalWrite(finLLED, HIGH);
            digitalWrite(finCLED, LOW);
            digitalWrite(finRLED, LOW);
            break;
          case CENTER:
            digitalWrite(finLLED, LOW);
            digitalWrite(finCLED, HIGH);
            digitalWrite(finRLED, LOW);
            break;
          case RIGHT:
            digitalWrite(finLLED, LOW);
            digitalWrite(finCLED, LOW);
            digitalWrite(finRLED, HIGH);
            break;
        }

      }
      else //If the data-retrieval statement returns FALSE, the packet is bad
        lcd.print("ERR: Bad Packet");
