When exporting ideas and input from the platform, the data will be exported into a single Excel spreadsheet. Pictures can not be exported, but attachments can be exported. If you make a "global" idea export (Admin > Project > Ideas > Export > Export all ideas of this project), the download link will be included for each idea in that spreadsheet. You can not “batch download” the attachments, you will need to click on each download link individually.
However, the spreadsheet does include multiple other useful information and data points, such as:
Author's name, email, user ID
Input metrics (upvotes, downvotes, comments)
Project & Tags