Example: How to port all the Tests & Quizes data?

Go to "Site Info", select "Import from Site", click "I would like to replace my data", select the site you want to bring the data from and click "Continue". Select what you want to bring (in this case, "Test & Quizes") and click finish.

Make sure the same tool (Test & Quizezs) must exist in the source and destination sites. Note that if you are linking to a resource tool in your content, the link information will not be automatically converted.