Solution For Slow File Transfer over USB

 Windows Vista and 7 have some known USB performance issues, so the first thing to do is run Windows Update and make sure your OS is fully patched. We’d also advise installing the latest drivers for your motherboard’s chipset and any discrete USB controllers.
You could also try setting the USB drive to performance mode. Open Device Manager, right-click the USB drive, and choose Properties from the menu. In the resulting window, click the Policies tab and tick the option labeled “Better performance.” Please note, this feature will enable write caching, so you’ll have to use the Safely Remove Hardware option when disconnecting the drive to prevent any data loss.