In Nucleus you are able to upload files to your organisation space to allow for instant sharing. You can make changes to this by setting up your own permissions. To read more about changing permissions in a shared drive, read the How to share documents with others article.
To start the process of uploading documents to an organisation space, click the name of the organisation and then click Documents.
Clicking the Add File option will allow you to search your computer for the files you'd like to upload. Alternatively you can drag and drop and files and/or folders into this space.