Did you create a home partition during your install. If so and you like to live at the edge, just re-install without repartitioning and do not re-format the home partition. Just hope it does not go wrong. Else, as others said, backup.
Give your question a chance to go around the world; bumping a thread within 24 hours is often not appreciated. And LQ bumps your thread automatically for you after 24 and 48 hours, so no need for bumping.