I bought a Seagate 250GB ATA100 HD (ST3250824A) on sale with a USB 2.0 enclosure. Now I know I have heard USB transfer speed blows but I thought that I needed a new HD anyway and the sale was cheap. Anyway my transfers to this drive are going at just under 10MB/s. In comparison my LaCie Firewire drive is a little over 30MB/s and to my internal drive I can break 50MB/s. I figure they are all 7200RPM drives so that can't be the cause in the difference in speed. So is is just the USB speed difference or could the ATA100 have to do with it?