Sample serializer/deserializer

using System.Collections;
using System.Collections.Generic;
using System;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;
using UnityEngine;
using UnityEngine.UI;



/*This script serializes a binary file for saving data. For Vita use, dataPath should be formatted as ux0:/data/someDirectoryName/ in the Inspector.
You should also define savePrefix in some fashion, otherwise youre saves will just be based on the number of the slot you've selected*/
public class SaveSerial : MonoBehaviour {

    public GameObject saveManager;
    public string dataPath;
    public string savePrefix;
    public string saveFileName;
    public bool hasLoaded;
    public int slotSelector;
// Set up the data we are saving to the file
    public string levelToSave;
    public GameObject player;
    public List<GameObject> medList;
    public List <GameObject> battList;
    public List<GameObject> lwList;
    public List<GameObject> hwList;



void Start() {
    SetScenes.sceneToLoad = "LoadScreen";
    levelToSave = this.GetComponent<SceneLoadTrigger>().currentScene;
//ignore this if we are in the editor

//create directory on the Vita for our save files if it doesn't exist
    if(!Directory.Exists(dataPath)){
        Directory.CreateDirectory(dataPath);
    }
}

 void Update()
 {
     slotSelector = SetScenes.currentScene == "Title" ? saveManager.GetComponent<LoadManager_Inputs>().selectedSlot : saveManager.GetComponent<SaveManager_Inputs>().selectedSlot;
     //set save file name based on the slot selected so we know which file we are loading/saving
    saveFileName = (savePrefix + slotSelector + ".sav");
 }

//this is the class we are using to store our data we want to save
[System.Serializable]

public class SaveData
    {
        public string savedLevel;
        public float[] playerPosition = new float [3];
        public float[] playerRotation = new float [3];
        public int playerMedkits;
        public int playerStimulants;
        public int playerBatteries;
        public float playerHealth;
        public List<int> collectedMeds = new List<int>();
        public List<int> collectedBattery = new List<int>();
        public List<int> collectedLightWep = new List<int>();
        public List<int> collectedHvyWep = new List<int>();

    }
//create a binary file, copy our data from the game to a SaveData instance
public void Save()
    {
        //data prep
        medList.Clear();
        medList.AddRange(GameObject.FindGameObjectsWithTag("Meds"));
        battList.Clear();
        battList.AddRange(GameObject.FindGameObjectsWithTag("Battery"));
        hwList.Clear();
        hwList.AddRange(GameObject.FindGameObjectsWithTag("Heavy"));
        lwList.Clear();
        lwList.AddRange(GameObject.FindGameObjectsWithTag("Light"));

        var bf = new BinaryFormatter();
        var file = File.Create(dataPath + saveFileName);
        var position = player.transform.position;
        var rotation = player.transform.rotation;
        var data = new SaveData();
        //data needed for reloading on game load
        data.savedLevel = levelToSave;
        data.playerPosition[0] = position.x;
        data.playerPosition[1] = position.y;
        data.playerPosition[2] = position.z;
        data.playerRotation[0] = rotation.eulerAngles.x;
        data.playerRotation[1] = rotation.eulerAngles.y;
        data.playerRotation[2] = rotation.eulerAngles.z;
        data.playerBatteries = InventoryManager.batteryCount;
        data.playerMedkits = InventoryManager.medCount;
        data.playerStimulants = InventoryManager.stimCount;
        data.playerHealth = player.GetComponent<PlayerController>().health;

        // //spin through list data to store identifiers

        //meds
        for (var i = 0; i < medList.Count; i++){
            data.collectedMeds.Add(medList[i].gameObject.GetComponent<Item_Enumerator>().identifier);
        }
        //batteries
        for (var i = 0; i < battList.Count; i++){
            data.collectedBattery.Add(battList[i].gameObject.GetComponent<Item_Enumerator>().identifier);
        }
        //light weapons
        for (var i = 0; i < lwList.Count; i++){
            data.collectedLightWep.Add(lwList[i].gameObject.GetComponent<Item_Enumerator>().identifier);
        }
        //heavy weapons
        for (var i = 0; i < hwList.Count; i++){
            data.collectedHvyWep.Add(hwList[i].gameObject.GetComponent<Item_Enumerator>().identifier);
        }

        bf.Serialize(file, data);
        PlayerPrefs.SetInt("haveSavedGame", 1);
        PlayerPrefs.Save();
        Debug.Log(data.savedLevel + " saved!");
        file.Close();
    }
//checks if the file exists, if so load the data from it and copy it back to our game
public void Load()
    {
        if (File.Exists(dataPath + saveFileName))
        {
            var bf = new BinaryFormatter();
            var file =  File.Open(dataPath + saveFileName, FileMode.Open);
            var data = (SaveData)bf.Deserialize(file);
            file.Close();
            levelToSave = data.savedLevel;

            Debug.Log (levelToSave);
            hasLoaded = true;
            SetScenes.nextScene = levelToSave;
            SetScenes.playerPosition = new Vector3( data.playerPosition[0],
                                                    data.playerPosition[1],
                                                    data.playerPosition[2] );
            SetScenes.playerRotation = Quaternion.Euler( data.playerRotation[0],
                                                         data.playerRotation[1],
                                                         data.playerRotation[2] );
            SetScenes.playerBatteries = data.playerBatteries;
            SetScenes.playerHealth = data.playerHealth;
            SetScenes.playerMedkits = data.playerMedkits;
            SetScenes.playerStimulants = data.playerStimulants;
            SetScenes.MedsRemaining = data.collectedMeds;
            SetScenes.BatteryRemaining = data.collectedBattery;
            SetScenes.LightWepRemaining = data.collectedLightWep;
            SetScenes.HvyWepRemaining = data.collectedHvyWep;
            PlayerPrefs.SetInt("hasLoadedFile",1);
            PlayerPrefs.Save();
        }
        else Debug.Log("No Save File Exists to Load!");
    }
//checks if the file exists, if it does, delete the file and reset our game variables
public void Reset()
    {

        if (File.Exists(dataPath + saveFileName))
        {
            File.Delete(dataPath + saveFileName);
            levelToSave = "";