This is my setup: 1 MacBook and 1 airport extreme (n) router with a HD connected to it via USB 2.0. I have been trasferring a large folder with only two files in it. It is around 17 GB total. However, according to iStat in the MenuBar, i am only sending data out at around ~5 Mb/sec. Is this the maximum speed for my situation? I have installed the N enabler that came with the AirPort extreme and have made sure that the router is running in N-only mode (at 5GHz). Also, in Network Utility when i choose my AirPort interface, the link speed is being reported as 130 mb. Why isn't this closer to 300? Is it because of the WPA2 protection? Edit: Removed WPA protection, and link speed is now correctly being reported as 300 mb. However, still around 4-5 Mb/sec transfer speeds to the drive. Am I missing something?