Iphone 5c could not be synced an unknown error occured (-4)

data synchronizationerror

Every time I try to synced music from my laptop to iPhone I get this message; I tried to reinstall Itunes I updated the iphone software, nothing works!!
I can't transfer any music on my Iphone from my computer !! This is insane

Best Answer

  • Launch iTunes, connect the device and uncheck Sync Music, Sync Movies, Sync TV Shows, and Sync Podcasts” in iTunes.
  • Click Sync. This will remove all media from the device but keep it in iTunes.
  • Disconnect the device from the computer.
  • Switch off the iOS device by holding down the Sleep/Wake button and using the Slide to Power Off button.
  • Hold down the Sleep/Wake button to turn the device back on.
  • Connect the device to the computer.
  • Click on the device in iTunes and tick the media that you want to sync.
  • Click Sync.
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