> The current Backblaze client excludes non-physical drives not connected via a USB or Firewire connector. While this has been Backblaze's policy for some time, our Client Teams have taken steps to reduce the number of allowed exceptions.

Ah, I see.

The backblaze backup cost is not size-based - people pay per computer, and this includes all internal and external hard drives (the external ones have to be attached every once in a while to be kept in backup). This definitely sounds like a game-able policy - what if I pay for a single computer license, and attach 100TB worth of drives there? What if I mount NFS share of my homeserver - can I backup it for the same PC fee a well?

I've used Backblaze backup for a long time (for my non-techinical friends) but never really thought long about how they can afford the flat price. Prohibiting non-physical drives would go a long way towards that. Looking at the docs, VeraCrypt can operate off the network drive, so I am guessing they had issues when it was used to present NAS/File share as a local drive?