How can I copy a card or contents from a card from Trello and paste it outside of Trello on a spreadsheet or document?
You can export data from Trello into a CSV using Import2 Wizard. Currently however we support export of the Boards and Organizations only.
Our product team is working on implementing the feature and I will update you here as soon we have news.
I want give you an update, that we have implemented Cards export from Trello. You can also select what fields you want to include in export and add filter criteria if you wish.