If you take full advantage of the CrashPlan software and subscription service you'll have
redundant local backups, remote backups at your friends» houses, and backups in the CrashPlan cloud.
We always recommend keeping a
local backup for quick restores (see our
backup software roundup for desktop solutions), but online can actually serve as both the second and third copies — assuming the vendor keeps its servers backed up, or adequately
redundant.