When I created the original Trello Backup a little over 2 years ago, it was primarily to ensure that we had a copy of our data, in the event that Trello was ever unavailable, but I've copied and customised it many times since then for a variety of reasons:

To extract only the cards from our Current Sprint list - this made printing cards much easier.
To extract the cards from our Pending Release list - this made viewing the release instructions stored on the cards that are awaiting deployment much easier.
To email a daily spreadsheet that contained any cards that had unchecked items on a checklist called questions. If there were no cards in the report, the email was not sent.

I also had various requests to be able to filter the cards backed up by list, member, or label so I thought it was time to bring out a new version of the spreadsheet using the new Google Sheets, that had the advanced filtering options, along with the emailing functionality I'd added.

You can find Trello Backup 3.0 here.

Enjoy.