Added file and device verification

FilePathAdd.java

@@ -1,3 +1,6 @@
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.util.Scanner;
 
 public class FilePathAdd {
@@ -5,9 +8,25 @@ public class FilePathAdd {
     public static String ImagePath = "";
 
     protected static String filePath(Scanner UserInput) {
-        System.out.println("Please enter the FULL Path of your ISO / Image. ()");
-        ImagePath = UserInput.nextLine();
-        System.out.println("Using File: " + ImagePath);
-        return ImagePath;
+        fileQuestion();
+        while (true) {
+            ImagePath = UserInput.nextLine();
+            if (ImagePath.isBlank()) {
+                System.out.println("Oops.. You didn't specify a file, did you missclick?");
+                continue;
+            }
+            Path path = Path.of(ImagePath);
+            try {
+                Files.readAttributes(path, "basic:size");
+                System.out.println("Using File: " + ImagePath);
+                return ImagePath;
+            } catch (IOException e) {
+                System.out.println("Failed to access file, invalid path or no access to file! Please try again.");
+            }
+        }
+    }
+
+    protected static void fileQuestion() {
+        System.out.println("Please enter the FULL Path of your ISO / Image. (No tab-complete)");
     }
 }