It seems to be a known issue with Win7:
http://social.technet.microsoft.com/Forums/windows/en-US/8a0ac171-7bd1-4b8d-8e93-c3b05f969255/windows-7-64-bit-usb-external-hard-drives-lose-its-connection-and-stops-working
Steve
On 7/28/2013 6:01 PM, Bobby Heid wrote:
Hey,
I have a 3TB WD external USB 2.0 drive. When I try to copy large files
(~50GB), the pc loses the connection and the copy fails after 15-20GB.
Any idea as to what causes this or how to correct the issue?
The drive seems to work normally except for this.
Thanks,
Bobby