This weekend I received an email from a teacher who is changing school districts over the summer. He was looking for an easy way to create offline copies of the files and information (contacts) that he has stored in his Google Drive and Gmail accounts so that the information could then be used again in a different account. My suggestion was to try the Google Takeout tool.
At the Google Takeout site you can create an offline archive of the information in your Google Drive, Gmail, Google Calendar, Photos, Books, and many other Google Services. To do so just visit Google Takeout and select the service(s) you want to archive. A list of the file formats that Google will export to is available here.