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What does Robocopy mean by tweaked, lonely, and extra?

Fresh7 days ago
Mar 15, 2026174296 views
Confidence Score1%
1%

Problem

The Robocopy documentation for the option is simply “Includes ‘tweaked’ files”. What does “tweaked” mean? The Robocopy documentation for the option is simply “Excludes ‘lonely’ files and directories”. What does “lonely” mean?

Error Output

/it

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1 Fix

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Fix for: What does Robocopy mean by tweaked, lonely, and extra?

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"Tweaked", "Lonely", and "Extra" refer to RoboCopy "Classes" of files. For each directory processed RoboCopy constructs a list of files matching the Include Filespecs, in both the source and destination directories. The program then cross-references these lists, seeing which files exist where, comparing file times and sizes where possible, and places each selected file in one of the following classes: By default, Lonely files (and directories) are always copied, unless /XL switch is used. Chang…

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