You can share files and folders with users that are not member's of your SharePoint site. It is possible to share files with other users outside of the organization that are not using SharePoint (no authentication required), you will need to reach out to OIT for assistance with this. Sharing internally, or with users outside of UCCS, but still have access to a SharePoint portal is easy.
Navigate to the file or folder that you wish to share, and clock the 3 dot menu button to the right of the name and click share.
Here, type in the name of the UCCS individual, or the email address for the external visitor and select the search result.
Click Send, and the user will receive an email with a link to the shared resources.