Ask HN: What do you use for file backups?

I classify my files into ordinary, important and vital. Once a week, everything gets backed up onto one of my two external drives. The important and vital stuff gets backed up onto a USB I always carry with me and the vital stuff also gets backed up onto Dropbox.

I am using Time Machine and Windows Backup to Time Capsule and Drobo. A friend recently hooked me up with a 1 year trial license so I am also currently testing CrashPlan from Code42 on Windows 7 and Windows 8 machines.

TimeMachine to a Btrfs RAID 1+0 NAS (hourly), BackBlaze (continous) and AWS Glacier fortnightly. I also use Carbon Copy Cloner to make a bootable backup about once/month (when I remember).

Backblaze.com continuously, and a nightly SuperDuper! image backup so I could get recover immediately after a disk crash.

(Belt and suspenders. ;-)

Rsync (cron) to a home NAS daily. SVN for code and work documents.

TimeMachine, on btrfs-RAID1 hosted by a HP microserver

rsnapshot to an old machine hosting a Linux software raid-5 array.

Mega.co.nz and Dropbox.

Jungle Disk/AWS