How to fix an iPhone or iPad that cannot be synced. Unknown error -39 has occurred

The iPhone and iPad are both widely popular devices, and the iPhone is the best-selling handset in the world. Unfortunately, even though Apple products are very popular, they are also quite fragile. If you’ve ever dropped an iPhone, iPad, or an iPod, then you know that they are often damaged or broken by impacts with hard surfaces, or they can stop working for a number of different reasons.

If you have an iPhone or iPad that you can’t sync, or you get an error message when you sync. This could be because of corrupt data in the iTunes library. To fix this issue, you can do a couple of things. First, reset your iPhone or iPad and make sure that you are using the latest version of iTunes.

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Many iTunes users are experiencing one of the most common problems with iTunes: error 39 stating iPhone (iPad/iPod) cannot sync. An unknown error has occurred (-39).

How does this unknown error arise? The iTunes 39 error usually occurs when synchronizing or restoring the iPhone iPad iPod with iTunes. Many Apple users experience iTunes Error 39, especially when trying to delete photos or videos from their iOS devices or download photos or videos from the iTunes library to their iOS devices.

Which is worse: Once iTunes error 39 occurs, you will not be able to update iOS data like photos and videos in iTunes or restore your iOS device from iTunes, which is definitely frustrating and annoying. Therefore, this guide offers several solutions to correct this unknown error.

What is the reason the iPhone or iPad cannot be synchronized. An unknown error has occurred (-39)

Unknown error (-39) means iTunes error 39 and usually occurs when syncing an iOS device via a Mac or Windows computer. This usually happens when you delete photos from your iPhone or iPad, or when you download photos and videos from your iTunes library.

If this error message 39 appears in iTunes, you may not be able to back up photos and videos from your iPhone or iPad that have been updated or restored in iTunes. In other words: This error code is a data loss warning.

In this article, you will learn how to fix iTunes 39 errors easily with different troubleshooting methods, including the easiest and fastest method.

To fix the synchronization error of iPhone or iPad. An unknown error has occurred -39

April 2021 Update:

We now recommend that you use this tool to fix the error. Moreover, this utility repairs common computer errors, protects you from file loss, malware and hardware malfunctions, and optimizes your PC for maximum performance. With this program you can quickly solve PC problems and prevent further problems:

  • Step 1: Download the PC recovery and optimization tool (Windows 10, 8, 7, XP, Vista – Microsoft Gold Certified).
  • Step Two: Click Start Scan to detect problems in the Windows registry that may be causing problems with your PC.
  • Step Three: Click Repair All to fix all issues.

Updates window

  1. Press Windows + I to open the settings.
  2. Click the Update and Security button and select Windows Update from the left pane.
  3. Select the Check for Updates button and wait for the verification process to complete.
  4. Click Download and Install to have Windows prompt you to install these updates.
  5. Wait for the updates to be installed and try backing up the device.
  6. Check if the problem persists.

Disable anti-virus software

  1. Press Windows + I to open the settings.
  2. Click on the Update & Security option and select Windows Security on the left tab.
  3. Select the Virus and Threat Protection option, and on the Settings page, click Manage Virus and Threat Protection settings.
  4. Virus and threat protection tab.
  5. Click the toggle switch under the Real-Time Protection heading to turn it off.
  6. Select Yes to all questions to prevent a virus from occurring during the backup process.
  7. After that, try making a backup and see if the problem persists.

Update iTunes

  1. Start iTunes and click the Help option at the top.
  2. Select Check for updates from the list.
  3. Wait until the check is complete and all available updates are displayed for you.
  4. Download and install these updates on your computer.
  5. Restart the computer and see if the problem persists.

Clear photo cache

Mac:

  1. From the Finder menu, press Go and choose Home.
  2. Tap the Photos option and choose the Photo Library, iPhoto Library, or Aper Library.
  3. Right-click on the selected files and select View Package Contents.
  4. To delete the iPod/iPhone Photo Cache or Apple TV Photo Cache folder, drag it to the Trash.
  5. Close the window and try to save the data.
  6. Check if the problem persists.

Windows :

  1. Press Windows + S on the keyboard to open the search bar.
  2. Type iPod/iPhone Photo Cache or Apple TV Photo Cache in the search bar and wait for the computer to finish searching.
  3. Right-click the folder and select Open Folder Location.
  4. Exit and select the folder.
  5. Press Shift + Del to permanently delete them.
  6. After that, try backing up the device and see if the problem persists.

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frequently asked questions

When you try to sync an iPhone, iPad, or iPod touch with a computer, the following warning message may appear: iPhone [device name] cannot be synced. This can happen if the file is locked on your computer or iOS or iPadOS device. Press OK to continue synchronization.

  1. Install the latest version of iTunes.
  2. Restart your computer.
  3. Check for updates on your Mac or PC.
  4. Try recovering the unit with another USB cable.
  5. Try restoring the product on another computer.
  6. Forced restart of the device.

Just click Help -> Check for updates after starting iTunes to make sure it’s the latest version. Connect the iPhone to the computer using a USB cable and launch iTunes on the computer. In this situation, iTunes will detect your iPhone in recovery mode and restore it.

An unknown error is a WebDriver error that occurs when an undefined error occurs in the driver during command processing. An unknown error is usually specific to a particular driver. It is therefore advisable to read any error message to get an idea of what happened.

This source has been very much helpful in doing our research. Read more about the iphone cannot be synced an unknown error occurred (-42408) and let us know what you think.

Frequently Asked Questions

What does the iPhone Cannot be synced An unknown error occurred (- 54?

For most iPhone users, the biggest issue with iTunes has been how it handles device syncing. iTunes 11, the latest version of Apple’s media manager and desktop app, is a great leap forward in terms of syncing, but that doesn’t mean it’s perfect. Here’s a quick look at how to avoid the most common iTunes syncing errors, ranging from syncing errors to syncing an unknown error (- 54). The iPhone cannot be synced An unknown error occurred (- 54), which is the error message that we often get when we sync the iPhone with iTunes. This error is more likely to occur when we have used an iPhone a lot, or when we want to sync the iPhone with a different computer. Sometimes, you may also get this error message because of a third-party application or an incorrect setting.

Can’t sync because iPhone Cannot be found?

Can’t sync because iPhone Cannot be found? Are you trying to sync your iPhone with iTunes and experiencing an error message stating that “iPhone cannot be synced because it cannot be found”? The reason for this error message is that you have not properly connected your iPhone to your computer. This is a very frustrating problem because all of the sudden your iPhone won’t sync. It doesn’t matter if you use iTunes or iCloud. The error message I receive is that the iPhone cannot be found. This is a very frustrating problem because all of the sudden your iPhone won’t sync. It doesn’t matter if you use iTunes or iCloud. The error message I receive is that the iPhone cannot be found.

Why are my iPad and iPhone not syncing?

It is always frustrating when your iPhone and iPad are not syncing and you cannot get your content from one device to the other. Fortunately, there are a few steps you can take to troubleshoot the issue. No matter what the problem, though, you should always start by making sure you have the latest version of all your apps and devices. To check if you have the latest iOS version, simply go to the Settings menu and open the General tab. Once here, look for Software Update. Sometimes it’s hard to figure out why your iPhone or iPad isn’t syncing. It seems like they should sync, but they don’t. Just recently, I ran into the problem myself. I couldn’t figure out why my iPad wasn’t syncing with my iPhone, and it made me wonder if there is something wrong with my iPad. Then I remembered there are two kinds of sync for the iPhone: iCloud sync and iTunes backup. I read my syncing guide to figure out how to sync my iPad and iPhone and it worked like a charm.

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