diff --git a/VFS/Examples/Ex01WorldController.cs b/VFS/Examples/Ex01WorldController.cs
index deb9208..4522789 100644
--- a/VFS/Examples/Ex01WorldController.cs
+++ b/VFS/Examples/Ex01WorldController.cs
@@ -27,6 +27,11 @@ void Update()
 
     public void SaveDataToFile()
     {
+        // Reset variables to default values, just in case.
+        boolVar = true;
+        intVar = -24;
+        charVar = 'a';
+
         /* Data is packed as follows:
         dataBuffer[0] = boolVar
         dataBuffer[1-4] = intVar
diff --git a/VFS/Examples/Ex03WorldController.cs b/VFS/Examples/Ex03WorldController.cs
new file mode 100644
index 0000000..e3de586
--- /dev/null
+++ b/VFS/Examples/Ex03WorldController.cs
@@ -0,0 +1,221 @@
+
+using UdonSharp;
+using UnityEngine;
+using VRC.SDKBase;
+using VRC.Udon;
+using UnityEngine.UI;
+
+public class Ex03WorldController : UdonSharpBehaviour
+{
+    public UdonBehaviour FileManager;
+    public UdonBehaviour FileSystem;
+    const int blockSize = 4;
+    const int blockCount = 4;
+    byte[] dataBuffer; // The size should always be blockSize*blockCount, for encryption purposes.
+    byte[] keyByteArr = new byte[]{0xa1,0x5d,0x1d,0xf2};
+    byte[] magicNumberByteArr = new byte[]{0xd2,0x8c,0x4a,0xc6};
+
+    // Data Variables
+    bool boolVar = false;
+    int intVar = 0;
+    char charVar = '-';
+    Color32 colorVar;
+
+    // UI Variables
+    public Toggle boolVarToggle;
+    public Slider intVarSlider;
+    public Text intVarText;
+    public InputField charVarInputField;
+    public Slider ColorVarRSlider;
+    public Slider ColorVarGSlider;
+    public Slider ColorVarBSlider;
+    public Image ColorVarPrevImage;
+
+    void Start()
+    {
+        colorVar = new Color32((byte)0,(byte)0,(byte)0,(byte)255);
+        OnBoolVarToggleValueChanged();
+        OnIntVarSliderValueChanged();
+        OnCharVarInputFieldValueChanged();
+        OnColorVarRSliderValueChanged();
+        OnColorVarGSliderValueChanged();
+        OnColorVarBSliderValueChanged();
+    }
+
+    void Update()
+    {
+
+    }
+
+    public void OnBoolVarToggleValueChanged()
+    {
+        boolVar = boolVarToggle.isOn;
+    }
+
+    public void OnIntVarSliderValueChanged()
+    {
+        intVar = (int)intVarSlider.value;
+        intVarText.text = intVar.ToString();
+    }
+
+    public void OnCharVarInputFieldValueChanged()
+    {
+        charVar = charVarInputField.text.Length > 0 ? charVarInputField.text[0] : '-';
+    }
+
+    public void OnColorVarRSliderValueChanged()
+    {
+        colorVar.r = (byte)ColorVarRSlider.value;
+        ColorVarPrevImage.color = colorVar;
+    }
+
+    public void OnColorVarGSliderValueChanged()
+    {
+        colorVar.g = (byte)ColorVarGSlider.value;
+        ColorVarPrevImage.color = colorVar;
+    }
+    
+    public void OnColorVarBSliderValueChanged()
+    {
+        colorVar.b = (byte)ColorVarBSlider.value;
+        ColorVarPrevImage.color = colorVar;
+    }
+
+    public void SaveDataToFile()
+    {
+        // Debug.Log($"bool:{boolVar},int:{intVar},char:{charVar},color:{colorVar}");
+        dataBuffer = new byte[blockSize*blockCount];
+
+        // Bytes 0-3 are the magic number
+        for(int i = 0; i < magicNumberByteArr.Length; i++)
+            dataBuffer[i] = magicNumberByteArr[i];
+
+        dataBuffer[4] = System.Convert.ToByte(boolVar);
+        
+        byte[] intByteArr = Int32ToByteArray(intVar);
+        dataBuffer[5] = intByteArr[0];
+        dataBuffer[6] = intByteArr[1];
+        dataBuffer[7] = intByteArr[2];
+        dataBuffer[8] = intByteArr[3];
+
+        dataBuffer[9] = System.Convert.ToByte(charVar);
+
+        dataBuffer[10] = colorVar.r;
+        dataBuffer[11] = colorVar.g;
+        dataBuffer[12] = colorVar.b;
+        dataBuffer[13] = colorVar.a;
+
+        // Encrypt data
+        dataBuffer = EncryptByteArray(dataBuffer);
+
+        FileManager.SetProgramVariable("fileDataBuffer",dataBuffer);
+
+    }
+
+    public void LoadDataFromFile()
+    {
+        dataBuffer = (byte[])FileManager.GetProgramVariable("fileDataBuffer");
+
+        // Decrypt data
+        dataBuffer = DecryptByteArray(dataBuffer);
+
+        // Data integrity check. If magic number in dataBuufer is wrong, data has been 
+        // tampered with. Let user know, and don't proceed further.
+        for(int i = 0; i < magicNumberByteArr.Length; i++)
+        {
+            if(dataBuffer[i] != magicNumberByteArr[i])
+            {
+                Debug.Log("File data has been tampered with. Data integrity test failed.");
+                return;
+            } 
+        }
+
+        boolVar = System.Convert.ToBoolean(dataBuffer[4]);
+
+        byte[] intByteArr = new byte[4] {dataBuffer[5],dataBuffer[6],dataBuffer[7],dataBuffer[8]};
+        intVar = ByteArrayToInt32(intByteArr);
+
+        charVar = System.Convert.ToChar(dataBuffer[9]);
+
+        colorVar.r = dataBuffer[10];
+        colorVar.g = dataBuffer[11];
+        colorVar.b = dataBuffer[12];
+        colorVar.a = dataBuffer[13];
+
+        Debug.Log($"bool:{boolVar},int:{intVar},char:{charVar},color:{colorVar}"); 
+        UpdateUIComponents();
+    }
+
+    void UpdateUIComponents()
+    {
+        boolVarToggle.isOn = boolVar;
+        intVarSlider.value = intVar;
+        charVarInputField.text = charVar.ToString();
+        ColorVarRSlider.value = (int)colorVar.r;
+        ColorVarGSlider.value = (int)colorVar.g;
+        ColorVarBSlider.value = (int)colorVar.b;
+    }
+
+    int ByteArrayToInt32(byte[] bArr)
+    {
+        if(bArr.Length != 4) return 0;
+        int res = 0;
+        for(int i = 0; i < bArr.Length; i++)
+        {
+            int maskedNum = 0;
+            maskedNum = bArr[i] & 0xff;
+            maskedNum <<= (8*((bArr.Length-1)-i));
+            res |= maskedNum;
+        }
+        return res;
+    }
+
+    byte[] Int32ToByteArray(int num)
+    {
+        byte[] res = new byte[4];
+        for(int i = 0; i < res.Length; i++)
+        {
+            int maskedNum = 0;
+            maskedNum = num >> (8*((res.Length-1)-i));
+            res[i] = (byte)(maskedNum & 0xff);
+        }
+        return res;        
+    }
+
+    byte[] EncryptByteArray(byte[] dataArr)
+    {
+        for(int i = 0; i < blockCount; i++)
+        {
+            for(int j = 0; j < blockSize; j++)
+            {
+                if(i==0) dataArr[(i*blockSize)+j] ^= keyByteArr[j];
+                else
+                {
+                    dataArr[(i*blockSize)+j] ^= dataArr[((i*blockSize)-blockSize)+j];
+                    dataArr[(i*blockSize)+j] ^= keyByteArr[j];
+                    dataArr[j] ^= dataArr[(i*blockSize)+j];
+                }
+            }
+        }
+        
+        return dataArr;
+    }
+
+    byte[] DecryptByteArray(byte[] dataArr)
+    {
+        for(int i = blockCount-1; i > -1; i--)
+        {
+            for(int j = 0; j < blockSize; j++)
+            {
+                if(i==0) dataArr[(i*blockSize)+j] ^= keyByteArr[j];
+                else
+                {
+                    dataArr[j] ^= dataArr[(i*blockSize)+j];
+                    dataArr[(i*blockSize)+j] ^= keyByteArr[j];
+                    dataArr[(i*blockSize)+j] ^= dataArr[((i*blockSize)-blockSize)+j];
+                } 
+            }
+        }
+        return dataArr;
+    }
+}