Say, I take the 5 USD/mo plan, which would give me 1TB of transfer per month.

If I spin it up as Linux server (A), mount a remote disk space through SSHFS (B), install an OwnCloud, BitSync or rTorrent instance on my DO droplet (A) and then point them to this remote SSH share (B) as file storage location, will the data stored/received on/from those remote locations (B) by external clients (C) through services running on DigitalOcean server (A) count against my bandwidth limit of 1TB?

Since the data will not actually be stored on Digital Ocean, I would think it would not. I am no network engineer, but it would seem strange (faulty) design if data transfers between B and C had to go through A.

But then again, maybe I am missing something so I want to know for sure.