Create JPG to HDD from Image In Assets-Folder

Merry Xmas folks,

I am working on a level editor and therefore I have certain Images to load from the Install-Directory [Standalone].

Each level has a preview-image that can be created during editing that is then stored in the Install-Directory. If it has no Image, a "NoImageAvailable"-Image is displaying.

However, if no level exists, the leveleditor-Script creates an example-level.

The example-level should have a pre-maked preview-image that represent the level-content. So an image that is in the Assets-Folder should be used.

How can I create an image to the Install-Directory from this Asset-Image?

I do not know if this approach will be working:

 var exampleImage : Texture2D = Resources.Load("Levels/Example.jpg") as Texture2D;
 var bytes = exampleImage.EncodeToJPG();
 var fileImage = new File.Open(Application.dataPath+"/Resources/Levels/Example.jpg",FileMode.Create);
 var binary = new BinaryWriter(fileImage);
 binary.Write(bytes);
 fileImage.Close();

Somehow it gives a NullReferenceExeption when initializing bytes although the exampleImage exists.