I have two 2 1TB external hard drives connected to my iMac. I've added them as sources through the Boxee Box, and they will scan, and I will be able to watch videos from them, but I will return later and they will be listed as "disconnected" and I can't access them. This has happened 3 times, and the only way for me to reconnect them has been to remove them as sources, then re-scan them. I have connected to them through SMB and direct IP.
Both drives work fine when running the Boxee software on my Mac.
The Boxee Box has been nothing but a headache for me thus far.