I'm at roughly the halfway point in my ripping program. I am keeping everything. First, I still use CDs in the car. Second, I haven't yet been able to fully trust hard drives, even with backups. Even when I eventually upgrade to a solid state drive, and even if I start using SDcards or USB thumb drives in the car, I will keep my CDs as the ultimate backup. Of course, it's not much reassurance: It's taken me 18 months to rip half of my CDs, so it's a 3-year project (accurately tagging my CDs, especially the home-made ones and needle-drops, is very time consuming). I don't think I'd ever want to do this a second time. I am seriously thinking about a second backup hard drive.