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Sometimes if you see error -54 when you sync with iTunes Click OK to continue the sync. If your content doesn’t sync, consolidate your iTunes Library files and check for issues with third-party security software. When you try to sync your iPhone, iPad, or iPod touch with iTunes, you might see an alert message that says:
“The iPhone [device name] cannot be synced. An unknown error occurred (-54).”
This can happen if a file on your computer or iOS device is locked. In most cases, your sync will continue if you click OK at the bottom of the message.
This iTunes sync error 54 is one common iTunes problem for iPhone, iPad, iPod and people may face when updating PC to a new Windows operating system.
And most of people think this iTunes sync error is related to authorization and administration issues – computer doesn’t permit unauthorized users to sync some data to iPhone/iPad/iPod touch. You may be the person who has no permission to modify or move the data, and the data you want to sync may be the “iTunes” folder or just some files (such as songs, pictures and movies).
If your content doesn’t sync, restart your computer and your iOS device. Also, make sure that you have the latest version of iTunes and the latest software updates for your device. If you still see the issue, continue below.
Consolidate the media files in your iTunes library
The media files in your iTunes library might be stored in several locations. Try consolidating your files into the iTunes Media folder.
Check for issues with third-party security software
Some third-party software, including security software, can interfere with the sync process between your computer and your device. Change your security software’s setup and see if it fixes the issue.
How to Fix Unknown Error (-54) about iPhone/iPad/iPod Cannot Be Synced
Sometimes fixing your iTunes sync error (-54) seems a little difficult because it is hard to find which files cause this problem. In this case, you have to sync separately to find what kind of data you can’t sync. For example, you can sync only songs to iPhone 6 or iPhone 7 to check whether the music files cause this unknown error (-54).
Of course, there are some common tips you can try to fix this error:
- Update your iTunes to latest version, now the latest version is iTunes 12.6.2.
- Upgrade iPhone/iPad/iPod touch to latest iOS operating system. Now you can update to iOS 10.3.3. (The iOS 11 will come out soon, you can update to it when it is available.)
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Authorize computer in iTunes.
Open iTunes > Choose “Store” on iTunes menu and authorize your computer.
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Change permissions of your “iTunes” folder or original files/folder.
You can find the originals that you want to transfer to iOS device and change permission. iMore give us one example to change “Read Only” permission of “iTunes folder” to fix iTunes sync error (-54) on Window 10:
Open Windows Explorer > Go to “Music” folder > Right Click “iTunes” folder > Properties > Uncheck “Read Only”.
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Run iTunes in administrative mode.
Sign in to Windows as an administrator > Right click iTunes icon > Select “Properties” > Select “Compatibility” > Check to run as administrator.
(For Windows iTunes users) Install all available Windows update service packs. iTunes sync error may be caused by incompatible driver on your windows pc.