When exporting, you need to specify the following parameters:
Target Local Repository
You can specify a single repository to export or All Repositories
Export Path on Server
The export target directory on your server
When set, repository metadata is excluded from the export. (Maven 2 metadata is unaffected by this setting)
Create .m2 Compatible Export
When set, includes Maven 2 repository metadata and checksum files as part of the export
Output Verbose Log
When set, lowers the log level to "debug" and redirects the output from the standard log to the import-export log.
Monitoring the log
You can monitor the log in the System Logs page.