Access path of stored asset

I want to share promo image for my game. At present I have adopted this way, Convert image into texture form and store into project directory and then share.

For this I have used following code

 byte[] bytes = texture.EncodeToPNG();
 string path = Application.persistentDataPath + "/MyImage.png";
 File.WriteAllBytes(path, bytes);

Then use new path for sharing purpose because this reference only access image. I don't want to create another copy of promo image, I directly want to use source image. But can't able to access that image through coding. I don't have any problem regarding placement of image in any folder. At present resides in the Resource folder.

I want path of promo image that was my sole purpose for creating this question.