v14 · Skip files that cannot change the result

Download verify.bat below, double-click it, drag in the original folder, then the copy. Nothing to install.
下载下方的 verify.bat，双击运行，先拖入原始文件夹，再拖入副本。 无需安装。

What's new in v14 · 本版更新

• Files on one side only are no longer read. Missing or extra files get that verdict whatever they contain, so they are reported straight away. Only files present on both sides with the same size are hashed. When a copy stopped half way, the missing half is skipped entirely.
  只在一边存在的文件不再读取。 缺少或多出的文件不管内容是什么结论都一样，直接报告；只有两边都有、大小相同的文件才计算哈希。复制中途中断时，缺少的那一半完全不用读。
• Before hashing, NOT READ shows how much was skipped and why.
  开始读取前，NOT READ 会显示跳过了多少、各是什么原因。

Also since v11 · v11 以来的其他改进: per-file progress, even inside one huge file (v12); files that differ in size are not read (v13); a more accurate time estimate (v11).
单文件进度，大文件也能看到进度（v12）；大小不同的文件不读（v13）；剩余时间估算更准（v11）。

Full history · 完整历史: CHANGELOG.md · CHANGELOG.zh-CN.md

Check your download · 校验下载的文件

SHA-256  afd32b398dcc74ba17182f5d1084ea3674fb246e9654cca72d662a36973d505c  verify.bat

Get-FileHash .\verify.bat -Algorithm SHA256

Windows may warn before running a downloaded .bat. The whole program is plain text inside the file, so you can read it in Notepad first. If it is blocked: right-click → Properties → Unblock.
Windows 可能会在运行下载的 .bat 前弹出警告。整个程序就是文件里的纯文本，可以先用记事本打开看一遍。如果被阻止：右键 → 属性 → 勾选解除锁定。

Requirements · 运行要求: Windows 8 or later, built-in Windows PowerShell 3.0+. No admin rights. · Windows 8 及以上，系统自带 PowerShell 3.0+，无需管理员权限。