iPhone连接MacOS电脑后打开iTunes时默认下会自动备份，除非在iTunes上点击手机图标并取消自动备份选项。由于中途取消备份，在iTunes上无法找到备份的地址，后续只能通过Terminal手工清除备份。
首先给Terminal授权：
In macOS 13 Ventura: Apple Menu › System Settings › Privacy & Security › Full Disk Access.
In previous verisons of macOS: Apple Menu › System Preferences › Security & Privacy › Privacy › Full Disk Access.
cd “/Users/huangqiang/Library/Application Support/MobileSync/Backup”
找到相应目录清除即可