TC Extremely slow when copying files from an external HDD

I have a new TC, everything works well. Now I am trying to copy my iTunes library from an external HDD that is hooked on the USB of the TC. The directory is well over 300GB, the estimated time of completion is 70+ hours, that can be?!
Last week I copied all my pictures from the same external HDD to another drive via USB connection on my laptop and the directory was about 200GB, it took about an hour.
Is there anything wrong or is this normal?
Thanks in advance,
Ilias

itsiph wrote:
Thanks for the quick answer. I was not clear enough though, I want to copy my iTunes library onto the TC from my external USB drive. The iTunes library is to stay on the TC so that I can always access it without the need of having an external HDD always connected to the TC.
What I do not want is the library on my MacBook.
DOes that make sense?
Yes, that's what I thought.
However you connect things, the copying process is done +*by your Mac,+* not the TC.
As I said, connect the USB drive directly to your Mac, and your Mac to the TC via Ethernet if at all possible. That will still take a while, since Ethernet is much slower than USB, but at least you won't have the data going back and forth through the TC. The data will go from the USB drive to your Mac, then to the TC via Ethernet.
If you leave the USB drive connected to the TC, the data will be copied from the USB drive, through the TC, to your Mac, then back to the TC's internal HD.

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Thank’s to read this message.
I’ve a MacBook Pro 13” (mid 2009) core2duo 2.26 Mhz whit 2GB ram and running Snow Leopard 10.6.2
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