Regex - File Path - Drive letter paths

Check whether a string looks like a valid path to a folder or file on the Microsoft Windows operating system.

Drive letter paths

^[a-z]:\\(?:[^\\/:*?"<>|\r\n]+\\)*[^\\/:*?"<>|\r\n]*$

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\A
[a-z]:\\                    # Drive
(?:[^\\/:*?"<>|\r\n]+\\)*   # Folder
[^\\/:*?"<>|\r\n]*          # File
\Z

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