After Losing 20gb Worth Of Data
I got careful about redundancy and backups as well. I have a dedicated lowpower/no noise Intel Atom-based NAS solution:
pic here with 5 disk slots, 4 of them are available to a built-in hardware RAID card (raid 0, 1 and 5 are supported), important data gets moved from my desktop PC to a mirror disk configuration on this NAS.
And the really really important stuff also gets automatically backed up online (there are some software options to automate this) on a weekly basis, just in case my apartment catches fire or something.