Organize work with projects changedcowork/guide/projects
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Upstream edited this page at 3 Nov 2026 18:29 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 3 Nov 2026 18:37 UTC.
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5050When you drag files or folders into a project, individual files are copied into the project's first folder and folders are mounted as additional project folders. A copied file never replaces a file that is already in that folder. A file or folder that is already inside one of the project's folders stays where it is and isn't copied or mounted. If the first folder already has a file with the same name, the copy is saved with a number added to its name, such as `notes (1).txt` for `notes.txt`. If that name and every numbered name up to `notes (19).txt` are already taken, the file isn't copied. Claude reads individual files up to 50 MB.
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52Cowork asks for your permission each time you open a Microsoft Office or OpenDocument file that can contain macros, such as a `.docm`, `.xls`, or `.odt` file.
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5254## Cowork projects and claude.ai projects
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5456A Cowork project is not the same thing as a project on claude.ai. They're stored separately and have different capabilities.
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