One of Drupal’s big advantages is its possibility to structure content with the use of fields. However, from time to time you will want to link a file to your content without the need of adding a field to the database for that purpose.
The D8 Editor File Upload module provides this functionality by adding a button to the toolbar of the rich text editor (in this case CKEditor). This way it is possible to upload a file and present it within the content through a link. This tutorial will expĺain the usage of this module.