At JigsawBox we always recommend that when you add your content into your JigsawBox you always keep a copy outside of your JigsawBox too. You can copy/paste your content into a Word document, or any other Word processing program.
If you have a lot of images, links, audio, video, etc., the easiest way to do this, is to use the HTML button. When you are happy with your JigsawBox module, before you even click Save, you can click the HTML button, copy everything you see, then paste this into the software of your choice. Then, if you ever accidentally delete a module or make a mistake, you'll have a back-up that you can simply paste into your JigsawBox and be ready to go!