Cannot Drag and Drop files to my iPhone

Simply put, it's not supported - not now, anyway.

It isn't supported at this time. The iPhone does not work like an iPod in that respect.

I guess my question would be, what do you want to drop and drag that is that important? If it is a file you really need that bad, email it to yourself to an acocunt that you have on your iPhone. There currently aren't any applications that you can use to modify any files right now anyway.

Drag and drop is only supported for music and videos right now.