Now that we know how to email a group, we need to figure out how to add an attachment to that group email. This is not as simple as adding the "Get Files from Dropbox" action. In order to do this we need to learn about setting, adding to, and using variables in the "Scripting" section of the Workflow actions. Don't worry - it is easier than working with variables in Algebra.
Workflow link: Email a group with attachment