How do they guarantee at least two offsite copies? That would require that they give everyone 1TB out of 3TB. Unless they're also storing on their own servers, in which case the consumer-housed device seems pointless.

And two copies is still pretty low for flaky infrastructure. They're basically setting up your data as a torrent cloud, except there are no seeds if you lose your equipment, so you're trying to download fragments from a bunch of other machines, and each fragment is only on a couple of machines.

What I meant was: I wish they had gone with at least 2 copies offsite. Sorry for the ambiguity.

And you're right - 2 copies would mean 1TB out of 3TB.

Ah, thanks for clarifying.