diff --git a/src/main/java/nsusbloader/Controllers/NxdtController.java b/src/main/java/nsusbloader/Controllers/NxdtController.java
index cc758c2..74ba291 100644
--- a/src/main/java/nsusbloader/Controllers/NxdtController.java
+++ b/src/main/java/nsusbloader/Controllers/NxdtController.java
@@ -52,7 +52,11 @@ public class NxdtController implements Initializable {
     public void initialize(URL url, ResourceBundle resourceBundle) {
         this.rb = resourceBundle;
 
-        saveToLocationLbl.setText(AppPreferences.getInstance().getNXDTSaveToLocation());
+        File saveToValidator = new File(AppPreferences.getInstance().getNXDTSaveToLocation());
+        if (saveToValidator.exists())
+            saveToLocationLbl.setText(saveToValidator.getAbsolutePath());
+        else
+            saveToLocationLbl.setText(System.getProperty("user.home"));
 
         btnDumpStopImage = new Region();
         btnDumpStopImage.getStyleClass().add("regionDump");
diff --git a/src/main/java/nsusbloader/NSLMain.java b/src/main/java/nsusbloader/NSLMain.java
index 8e2585d..1c0810e 100644
--- a/src/main/java/nsusbloader/NSLMain.java
+++ b/src/main/java/nsusbloader/NSLMain.java
@@ -26,6 +26,8 @@ import javafx.scene.image.Image;
 import javafx.stage.Stage;
 import nsusbloader.Controllers.NSLMainController;
 
+import java.io.File;
+import java.nio.file.Paths;
 import java.util.Locale;
 import java.util.ResourceBundle;
 
diff --git a/src/main/java/nsusbloader/RainbowHexDump.java b/src/main/java/nsusbloader/RainbowHexDump.java
index d3131ad..ebdd277 100644
--- a/src/main/java/nsusbloader/RainbowHexDump.java
+++ b/src/main/java/nsusbloader/RainbowHexDump.java
@@ -41,7 +41,7 @@ public class RainbowHexDump {
         System.out.println(">"+ANSI_RED+byteArray.length+ANSI_RESET);
         for (byte b: byteArray)
             System.out.print(String.format("%02x ", b));
-        //System.out.println();
+        System.out.println();
         System.out.print("\t\t\t"
                 + new String(byteArray, StandardCharsets.UTF_8)
                 + "\n");
@@ -54,8 +54,7 @@ public class RainbowHexDump {
         for (byte b: byteArray)
             System.out.print(String.format("%02x ", b));
         System.out.println();
-        System.out.print("\t\t\t"
-                + new String(byteArray, StandardCharsets.UTF_8)
+        System.out.print(new String(byteArray, StandardCharsets.UTF_8)
                 + "\n");
     }
 
@@ -66,8 +65,7 @@ public class RainbowHexDump {
         System.out.println(">"+ANSI_RED+byteArray.length+ANSI_RESET);
         for (byte b: byteArray)
             System.out.print(String.format("%02x ", b));
-        System.out.print("\t\t\t"
-                + new String(byteArray, StandardCharsets.UTF_16LE)
+        System.out.print(new String(byteArray, StandardCharsets.UTF_16LE)
                 + "\n");
     }
 }
diff --git a/src/main/java/nsusbloader/Utilities/NxdtUsbAbi1.java b/src/main/java/nsusbloader/Utilities/NxdtUsbAbi1.java
index 10dd560..4cdd800 100644
--- a/src/main/java/nsusbloader/Utilities/NxdtUsbAbi1.java
+++ b/src/main/java/nsusbloader/Utilities/NxdtUsbAbi1.java
@@ -31,6 +31,7 @@ import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
 import java.nio.IntBuffer;
 import java.nio.charset.StandardCharsets;
+import java.nio.file.Paths;
 import java.util.Arrays;
 
 class NxdtUsbAbi1 {
@@ -104,7 +105,7 @@ class NxdtUsbAbi1 {
             while (true){
                 directive = readUsbDirective();
 
-                RainbowHexDump.hexDumpUTF8ForWin(directive);
+                RainbowHexDump.hexDumpUTF8(directive);
 
                 if (isInvalidDirective(directive))
                     continue;
@@ -132,7 +133,7 @@ class NxdtUsbAbi1 {
         }
         catch (Exception e){
             e.printStackTrace();
-            logPrinter.print(e.getCause()+" "+e.getMessage(), EMsgType.INFO);
+            logPrinter.print(e.getMessage(), EMsgType.INFO);
             logPrinter.print("Terminating now", EMsgType.FAIL);
         }
     };
@@ -145,17 +146,24 @@ class NxdtUsbAbi1 {
         }
         if (message.length < 0x10){
             writeUsb(USBSTATUS_MALFORMED_REQUEST);
-            logPrinter.print("Invalid directive size. "+message.length+" bytes received.", EMsgType.FAIL);
+            logPrinter.print("Directive is too small to be a command. Only "+message.length+" bytes received.", EMsgType.FAIL);
+            return true;
+        }
+
+        int payloadSize = getLEint(message, 0x8);
+        if (payloadSize + 0x10 != message.length){
+            writeUsb(USBSTATUS_MALFORMED_REQUEST);
+            logPrinter.print("Invalid directive size. "+message.length+" bytes received while "+payloadSize+" expected.", EMsgType.FAIL);
             return true;
         }
         return false;
     }
 
     private void performHandshake(byte[] message) throws Exception{
-        final byte versionMajor = message[10];
-        final byte versionMinor = message[11];
-        final byte versionMicro = message[12];
-        final byte versionABI = message[13];
+        final byte versionMajor = message[0x10];
+        final byte versionMinor = message[0x11];
+        final byte versionMicro = message[0x12];
+        final byte versionABI = message[0x13];
 
         logPrinter.print("nxdumptool v"+versionMajor+"."+versionMinor+"."+versionMicro+" ABI v"+versionABI, EMsgType.INFO);
 
@@ -185,7 +193,6 @@ class NxdtUsbAbi1 {
             filename =  saveToPath + filename;
 
         File fileToDump = new File(filename);
-
         // Check if enough space
         if (fileToDump.getParentFile().getFreeSpace() <= fileSize){
             writeUsb(USBSTATUS_HOSTIOERROR);
@@ -193,7 +200,7 @@ class NxdtUsbAbi1 {
             return;
         }
         // Check if FS is NOT read-only
-        if (! fileToDump.canWrite()){
+        if (! (fileToDump.canWrite() || fileToDump.createNewFile()) ){
             writeUsb(USBSTATUS_HOSTIOERROR);
             logPrinter.print("Unable to write into selected volume: "+fileToDump.getAbsolutePath(), EMsgType.FAIL);
             return;
@@ -234,7 +241,7 @@ class NxdtUsbAbi1 {
     }
 
     private void dumpFile(File file, long size) throws Exception{
-        RandomAccessFile raf = new RandomAccessFile(file, "rw");
+        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(file, false));
 
         byte[] readBuffer;
         long received = 0;
@@ -242,7 +249,7 @@ class NxdtUsbAbi1 {
 
         while (received < size){
             readBuffer = readUsbFile();
-            raf.write(readBuffer);
+            bos.write(readBuffer);
             bufferSize = readBuffer.length;
             received += bufferSize;
 
@@ -250,10 +257,9 @@ class NxdtUsbAbi1 {
         }
 
         logPrinter.updateProgress(1.0);
-        raf.close();
+        bos.close();
     }
 
-
     /**
      * Sending any byte array to USB device
      * @return 'false' if no issues