My old router recently died so I bought a new Airport Extreme. I was excited to attach a USB Hard drive so i could keep all my computers on the same itunes library. Its a fairly large library, and when I launch itunes through the network drive it seems to navigate slower than normal. There seems to be lag as the hard drive gets up to speed. Is this to be expected over a wireless network? Also the drive is 4 years or so old, not sure what the rpm on it is but it might not be up to par on todays external hard drives. So my main questions are, would investing in a new hard drive improve my performance? And if a ethernet drive is a better solution, does airport extreme support ethernet hard drives? Thank you for your time and any feedback is appreciated.