Screen shots on the Xbox 360

I'm simply wondering if there is a way to somehow capture the backbuffer contents to a file on the xbox 360 and then transfer that file back to the PC I've checked the framework docs and this forum and it doesn't seem to be possible, but I'm hoping that I am wrong. :-)

A screenshot looks slightly less amateurish on a website than if I photograph my TV, even though it still looks like programmer art. The one solution I have come up with is to run the same code on the PC and capture the screen that way. The problem is that my PC GPU isn't on par with the Xbox 360 and I would prefer not to have to write separate shaders just to enable me to capture the screen. Plus, the screen shots would be uglier.

Actually, what I want is an actual digital pixel-for-pixel accurate dump of the screen. I.e. I want to save the backbuffer data and then get it across to the PC. The VGA signal is analog so it would still not be totally accurate, but it's definitely one option to consider if there is no way to do it in software.

Yes, that should work, but the part I can't figure out how to do is this: How do I get the tga (or whatever file format one would use) back to the PC As far as I can tell, you can save to file on the 360, but I see no way of transferring it back to the PC. Maybe this is trivial and I have misunderstood the documentation, I don't know. :-)

I guess what I am really asking is this: How do I access a file that has been stored on a 360 storage device using the XNA framework from my PC