Workflows. Campaign workflows are a really good way to automate these kind of processes (importing data > processing data > exporting results). The activity dedicated to export is described here: https://docs.campaign.adobe.com/doc/AC6.1/en/WKF_Repository_of_activities_Action_activities.html#Ext.... For example, you can use a Query activity to target a specific campaign and then use an Extraction (file) activity to select the data you want to export and the file format you want to get. Note that this is a really basic example and that your use case could require more activities/settings to meet your needs.
When it comes to import campaigns, there is no dedicated mechanism to do it but there again if you manage to export the data you need in a flat file, you should be able to reimport these data into Adobe Campaign.