zen123, I'm glad to see that you started in a relevant thread, but it makes sense to stay there and not start a NEW thread on cloning the OS unless there is good reason for it. I think you should edit your above post that you don't want an answer here, and that you should repost in one of the established threads. (Also, btw, your thread title isn't accurate: you aren't extending the file system, you're making a new os wholly contained on the mmc.)