Well the good news is that I was able to restore 200 or so images scanned in ~15 years ago. If the last back-up had failed, I could have re-scanned the slides. But I used a good scanner "back then" and spent time with Photstyler 1.1 and Photoshop 3.0 cleaning them up. Main Disk Drive had corrupted, needed low-level reformat. Second Machine, older Win95B machine, Intermittent Disk would not spin up every time. CD back-up was bad. 1GByte Jaz Disk with a 1998 backup Failed. 100MByte ZIP Disks from 1998 worked. Felt like a Star Trek Episode where they come across the 20th century spacecraft and have to read the disk files. I've got some 20 year old Digital images, Kodak DCS200, Kodak DC50, scans. This evening made be think twice for backing up. CD/DVD can delaminate, even my older music CD's are going bad. Magnetic media fails. High-density Terabyte drives are likely to fail much sooner than the 1GByte drives pushing almost 20 years old. I use a 1GByte drive from 1993 in a machine at work as a backup drive in a tower. It just works, and is 1 of 2 drives in the machine. Everything is mirrored. But with 36MByte Raw files from the M9- I'm leaning towards using several 500GByte drives and checking integrity every so often. I'm also going to look at the Mass-Store flash drives. I use a 64GByte USB drive at work. But then again: I had CF cards and SD cards fail.