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Confluence can back up all the content, comments and attachments for a space. The process involves converting the data in the space into XML format. The end product is a zip file that contains XML file(s) that define the content of the space, and optionally a folder containing the attachments in the space. To transfer this data to another Confluence site, you can upload the zip file.
Creating a space backup
See Exporting Confluence Pages and Spaces to XML.
Restoring (importing) a space backup
See Restoring a Space.
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