After upgrading PC or laptop to Windows 10 user may have to face lots of issues, one of them is: unable to syncing iPhone, iPod, or iPad with the Windows 10 system. After upgrading your Windows system to Windows 10 you get unable to sync your iDevice with the upgraded PC. Don’t get upset because the solution is found to fix this issue. Apply the given method and you will be able to sync your iDevice with your computer again.
This error appears because Windows 10 update makes the iTunes folder as Read Only, it means that your computer won’t let it to sync with the iDevice you have plugged in.
Steps to fix this -54 error
Open Windows Explorer -> Click on the Music folder -> Right click on your iTunes folder -> Go to Properties -> Uncheck the Read Only option present under Attributes
Another pop up window will appear as it affecting all the modifications to the entire sub-folders. This quick fix will make you able to do the sync. If you are still facing the problem then make sure that you have full control over the iTunes folder.
To verify this, right click on the folder again -> go to properties -> security -> click edit -> select full control and apply.
After the competition of above given steps, you must be able to sync your iDevice again without any error.