i tunes syn error -45054 about sync error and instruction told to
Feb 29, 2016 · Type " regedit " and hit ENTER. In the Registry Editor, select the Error -45054-related key (eg. iTunes) you want to back up. From the File menu, choose Export. In the Save In list, select the folder where you want to save the iTunes backup key. In the File Name box, type a name for your backup file, such as "iTunes Backup".
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