The Generate Report feature enables you to download a spreadsheet of group members.
Start by managing your group Managing Your Group, Group Dashboard, then open your Members list Members List: Managing Group Members. If needed, apply a filter or search to get only the members you want to download.
Select the members to include, and click Generate Report.
This creates and downloads a CSV file with membership details on the selected members, including ID, email, tags, source type (how they were added to the group), sign-up date, etc.