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Thread: itunes could not backup the iphone cause of unknown error -20

  1. #1

    Member Since
    Jul 24, 2010
    itunes could not backup the iphone cause of unknown error -20
    been getting this error for awhile now, i searched all over the net for the solutions and tried various things like reinstalling itunes and it didn't work, so unplugging and or changing where my iphone is plugged in that didn't work, but i have not been able to sync or backup my phone for over a week

    64bit itunes
    windows7 Pc

    if anyone needs anymore info from me lemme know

    but i have tried all of the obvious restart your computer stop all the apple related programs and start them all over again, change usb port type solutions, and i have no clue how to fix this

  2. #2
    I would check the Apple Support Forums for this.

  3. #3

    iggibar's Avatar
    Member Since
    Apr 20, 2009
    I get the same error with my iphone and ipad. 2nd time always works though...
    “If you are distressed by anything external, the pain is not due to the thing itself but to your own estimate of it; and this you have the power to revoke at any moment.” Marcus Aurelius

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