Hi @wang
Welcome to the community.
Can you please check this related topic: https://community.atlassian.com/t5/Confluence-questions/Missing-file-quot-exportDescriptor-properties-quot/qaq-p/896189
Did you download the export file on a Mac?
If you get an error saying that Confluence can't find theexportDescriptor.properties
file, chances are OS X has unzipped the backup for you and sent the original zipped file to the trash. You need to retrieve the original zip file from the trash and then try the import again.
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