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I connected my iPhone 4S as well as my Toshiba external hard drive to my Dell Windows 7 laptop. For relatively small files I can use Ctrl-C and Ctrl-V to copy directly from the iPhone to the external hard drive. But for large video files (around 500MB) the copy hangs.

I discovered a workaround, which is to copy the file from the iPhone to the laptop's internal hard drive, then from the hard drive to the external drive, which works. How can I get the copy to work directly for these large files?

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How many USB ports does the laptop have? Try different combinations to connect the iPhone and external drive to the laptop. If that doesn't help, try connecting both to a powered USB hub. – Karan Nov 8 '12 at 16:48
Should I suspect a defect in either of them? – JoelFan Nov 8 '12 at 18:35
Not a defect, I was thinking more along the lines of possible bandwidth constraints while connecting both devices to ports from the same root hub. – Karan Nov 8 '12 at 18:38

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