HT204770: Get help with iOS update and restore errors
Learn about Get help with iOS update and restore errors
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Oct 29, 2015 5:14 AM in response to Corinnafromcoby Terrencefromvt,I have the same problem with a 5S. Error -54 cant copy files to Windows folder.
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Oct 30, 2015 9:23 AM in response to Corinnafromcoby tizee,I have same problem on iPhone 6 (iOS 9.1) with El Capitan! The iTunes (12.3.1.23) just stops sync in the middle and gave me "Attempting to copy to the disk Macintosh HD failed. An unknown error occurred (-54)". But my iPad Air 2 is ok.