Okay, now we're confused (that's the royal we, GA is never confused). If you simply want online backup where no one sees your files, that's easy. If you want people to see your images but not make copies of your images then forget it. It simply isn't possible. I have yet to encounter a website image that can't be grabbed with Alt-print screen. The watermark idea is probably the best approach and there is software for batch processing watermarks on to your images. There are methods to add watermarks on the fly using server scripts though they suck server resources.