With Ulysses, you can write all kinds of texts, even novels. For you as a writer, your works certainly are very valuable, to the point that loosing them is not an option. For this reason, Ulysses will automatically back up your entire library. You can be sure that your works are safe.
This is my current go-to text editor and I did not know about this. I really hope they add Dropbox integration to the iOS version of Ulysses though — that’s the only thing that’s currently missing and it totally screws with my workflow.