Take a screen capture of the data you plan to use for your capstone project loaded into ArcMap or ArcCatalog, and submit the image as an attachment to the Screen Capture of Data Assignment in Canvas (Capstone Project area). Symbolization does not have to be figured out, and layout does not have to be present. If you have multiple layers or files, make sure they are visible in ArcMap's table of contents panel or in the ArcCatalog's tree panel.
This is purely a step to make sure that your project idea is feasible, and you do not get stuck at the stage of acquiring data when you should be well into designing your map. If you have questions, you can include notes in the message of the dropbox submission.
This mile marker assignment is due with the Lesson 8 project. See the Calendar in Canvas for the exact due date.