Hard drives do not cost the same, are you high? I have dozens of TBs backed up now, over the years, but many TBs just recently. It would cost me 1000s for hds. I don't think you have any idea how much data I actually have. I can still read even the first cds I burned 12 years ago. Every hd I've had in that time has died. You keep your optical disks in a spindle, and in a dark place like a closet. I haven't had a single failure with 100s of optical disks. I've already backed up 30 blurays since I bought this new drive, it friggin rocks! I suspect I will be able to read these discs 10 years from now no problem, long after the hds I got the data from died. I've thrown out dozens of hard drives, I haven't thrown out a single optical disk I've burned in 20 years. (Yes, remember 1x burning under dos?) Yes, the dye can degrade... boohoo... over time you should be condensing your collection to new media.. constantly refreshing it. I started with cds, reburned to dvds, reburned to dl-dvds, and now reburning to bluray. Static backup to mechanical hd, no dam way, sorry, not safe.