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If a password is specified on the export pane then all data will be encrypted, and the password will be required for import. If a password is not specified then all data will be exported unencrypted.
The compress tick box on the export form can be used to compress the exported data files. If this is not ticked the data will be exported as an uncompressed zip archive.
This process can be used to export data from Streams to import into another system. For import the Streams must already exist on the target system so a configuration export may be required to create the Streams before data can be imported.