I have a WD 2T HD 7200 RPM. Plugged in as a USB drive, the transfers speed is 7mg/sec, but if I use it as an internal SATA it's about 190mg/sec. I've tried 3 different USB interfaces with the 2T drive with the same results. Other USB HD's that I have aren't slow like this one is even with the same USB interface.

I have it set for better performance not quick removal and indexing is turned off. I bought this drive as an external USB HD and itís 2.0 USB. I put it back in itís original case and that didnít help. It certainly wasnít this slow with XP or WIN 7. Any suggestions?