You can copy and paste repository data across the various repositories available in your Data Repositories view. You can do this with the entire repository or with just a data set. You can also copy an entire data repository server to a new data repository server; see Migrating Data Repository Servers.
To copy repository data:
Merge: Import new data without modifying existing data.
Update: Update matching records with new data and create new records as needed.
Overwrite: Update matching records (with matching keys) with new data, but do not create any additional records.
SeeĀ Understanding Data Set Import Options for more information about the import options.