Not sure I understand it well, but if I do, you won't be able to have a file path (meaning the dropped file fullpath).
It's a "protection" from browsers. But you can at least get the name of it.
var file = e.originalEvent.dataTransfer.files[0],
reader = new FileReader();
reader.onloadend = function (event) {
console.log(file);
// filename is in file.name
// ... do something here
}
reader.readAsArrayBuffer(file);
Here is a jsFiddle of how to do it: jsFiddle demo