I have a hacked AppleTV and it works fairly well with my external USB drives I have attached to it. I usually upload movies via SFTP to the AppleTV. All machines on my network are connected wirelessly via Airport Extreme. On some occasions, uploading to the AppleTV is dog slow - for example, I am currently uploading at 4Kb/sec, which is downright ridiculous. I have restarted the AppleTV, the Airpot Extreme Base station and the problem still randomly persists. Any ideas on what can be causing this erratic behavior?