Welcome to ADDI Challenge and Workbench. My name is Ned I can help you with issues related to Workspaces, for example how to work in Virtual Desktops, use the filesystem, move or copy files and similar.
For help with copying files to make them available on Windows machine, I made a post about that, please see: Not able to get starter notebook
Questions related to submission process are not my forte though
Please let me know if you need any help and tag me on your questions related to Workspaces.