Are you regularly backing up your Reunion family files? Making a backup is important for more than protecting your precious research in the event of hard drive failures and catastrophes. Be sure to make a copy of your family file before making significant changes to your family file. Reunion for Mac’s creator, Leister Productions, even recommends making a backup before you make any changes. Whether you’re that cautious or not, you’ll eventually want to make a backup. There are basically two ways to make a backup copy of a family file.