backup error "attempt to copy to disk"C:\" "failed. An unknown error occurred (-54). »

When syncing iPhone 6 running iOS 9.3.1 I get the following error message: "attempt to copy to disk"C:\" "failed. An unknown error occurred (-54). »

I am running iTunes 12.3.3.17 on a 64-bit Windows 7 Pro computer. I am logged in as administrator. The laptop has 8 GB of RAM and 700 + GB of available disk space.

It seems to be synchronization of contacts and the calendar correctly, but the local backup fails.

Does anyone have a solution for this?

Thanks for your help.

Help with error 54 here > If you see the error-54 when you synchronize with iTunes

Tags: iPhone

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    Thank you, and in what concerns:
    Shekhar S - Microsoft technical support.

    Visit our Microsoft answers feedback Forum and let us know what you think.
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