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 This option will create a space that you and your users can use to get to know Confluence. You can delete this space at any time.

Use this option if you have a full site export of an existing Confluence site. This is useful when you’re migrating to another database or setting up a test site.  

Good to know:

• You can only import sites from the same or earlier Confluence version.
• The system administrator account and all other user data and content will be imported from your previous installation.

In the setup wizard:

• Upload a backup file – use this option if your site export file is small (25mb or less).

• Restore a backup file from the file system – use this option if your backup file is large. Drop the file into your <confluence-home>/restore directory then follow the prompts to restore the backup.

• Build Index – we’ll need to build an index before your imported content is searchable. This can take a long time for large sites, so deselect this option if you would rather build the index later. Your content won't be searchable until the index is built.