How to recover from error 4005 when doing an iOS update.

If you see error 9, 4005, 4013, or 4014 when you restore your iOS device

When you try to update or restore your iPhone, iPad, or iPod touch, you might see one of these messages in iTunes.

Try to update your iOS device again

If your iOS device disconnects during the update or restore or if iTunes couldn't tell the device to restore, you might see one of these messages: 

• The iPhone [device name] could not be restored. An unknown error occurred (9).
• The iPhone [device name] could not be restored. An unknown error occurred (4005).
• The iPhone [device name] could not be restored. An unknown error occurred (4013).
• The iPhone [device name] could not be restored. An unknown error occurred (4014).

Try these steps:

1. Install the latest version of iTunes.
2. Force your device to restart:

• • iPad models with Face ID: Press and quickly release the Volume Up button. Press and quickly release the Volume Down button. Press and hold the Top button until the device restarts.
  • iPhone 8 or later: Press and quickly release the Volume Up button. Press and quickly release the Volume Down button. Press and hold the Side button until you see the Apple logo.
  • iPhone 7, iPhone 7 Plus, and iPod touch (7th generation): Press and hold both the Side (or Top) button and the Volume Down button for at least 10 seconds, until you see the Apple logo. 
  • iPad with Home button, iPhone 6s or earlier, and iPod touch (6th generation) or earlier: Press and hold both the Side (or Top) button and the Home button for at least 10 seconds, until you see the Apple logo.

1. Connect your device to your computer using a USB cable. 
2. When iTunes asks you to update or restore, click Update—not Restore—to reinstall iOS and keep your personal data.

If you still need help, try these steps

If you can update your device but it starts up in recovery mode, follow the steps above again. On step 4, choose Restore instead of Update. After the restore completes, you need to set up your device from a backup.

If you still see an error during the update:

1. Check for updates to your Mac or PC. If you restart your computer for an update, check for updates again after you restart.
2. Try to restore your device using another USB cable.
3. Try to restore your device on another computer.

If you continue to see error 9, 4005, 4013, or 4014 when you try to restore your iPhone, iPad, or iPod touch, contact us.

Learn about other update and restore errors.

If you see error 9, 4005, 4013, or 4014 when you restore your iOS ...

https://support.apple.com/en-us/HT201444

See this article: https://support.apple.com/en-us/HT201444