How to also copy subfolder's new and modifed files?

This code only copies new and modified files under E:\Document but leaves all the subfolders and their new and modified files uncopied.
How do I also get the subfolder's new and modified files also copied?

Code:

---

const string sourcePath = @"E:\Document";
  const string destPath = @"D:\Test";
  string[] originalFiles = Directory.GetFiles(sourcePath, "*", SearchOption.AllDirectories);
   
  Array.ForEach(originalFiles, (originalFileLocation) =>  {
        FileInfo originalFile = new FileInfo(originalFileLocation);
        FileInfo destFile = new FileInfo(originalFileLocation.Replace(sourcePath, destPath));
        if (destFile.Exists){
              if (originalFile.Length > destFile.Length{
                    originalFile.CopyTo(destFile.FullName, true);
              }
        }
        else {
              Directory.CreateDirectory(destFile.DirectoryName);
              originalFile.CopyTo(destFile.FullName, false);
        }

---

}