Quickest way of copying large file to external hard drive

OM2

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Aug 7, 2011
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I have an Acronis backup that is 140GB.
I have an external hard drive that I am trying to copy to (on a USB 3 port).
I have Teracopy installed which is doing the copying.
It's saying it will take 2 hours +.
External hard drive is a WD My Passport Ultra.

What am doing wrong?
Why is it taking so long?
How can I speed up?

Aside: how do programs like Acronis backup an ENTIRE hard drive in a matter on minutes? Say 20-30 minutes a whole hard drive will have been backed up.

Thanks.
 

OM2

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i was 100% sure it's the USB 3 port i have plugged into
how can i confirm if i am plugged into the USB 3 port?
thanks

EDIT: i unlugged and plugged into another port.
it started off saying 38 minutes.
does that sound right?
 

OM2

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thanks for the replies guys.
the laptop i have has 'SS' next to 2 ports.
the port on the other side does not have this.
my laptop has 2 USB ports.
i guess SS means USB 3.

the thing is... the first port i was plugged into was the other SS port.
weird. :)