Originally posted by roentarre I would put all digital files in multiple DVDs as back up
Let's say I'm having a good day with my K20D at a track & field event, or motor race, or orgy. Let's say I'm shooting RAW, averaging 12MB per shot, firing many continuous 16-shot sequences. I have a 16GB SD card. I can easily fill the card that day, with as few as 85 presses of the shutter button. That fills up 85% of 4 DVDs. And I have to pray that the DVDs stay good for awhile, and that they can be read by various of the machines in my home.net, not just the one they were burnt on.
OK, that's an extreme scenario. On my last drive across Mexico, I usually filled the card once per week (no continuous shooting, no orgies) and burnt DVDs for that batch, as well as migrating them to an ultraportable 250GB drive (SimpleTech Espresso, about US$130 at CostCo). Your needs may vary. But shooting with 5mpx PNSs awhile back, it only took a year to be overflowing with hundreds of CDs. Shooting the 14+mpx K20D for the last year would easily have loaded me with 100+ DVDs.
I recall an early CP/M manual. (That's an ancient ancestor of DOS, the core of Windoze.) The illustration for the file system showed office workers merrily sailing dozens of floppy discs (the 5.25 inch sort) out of windows. That's how I feel when I dig through my many binders holding my many data discs. I yearn for some skeet-shooting. Sail'em, blast'em, be done with'em. No, big RAID drives are much much easier to deal with.