2.2.1 Working with files
What is the file picker?
The File Picker enables files to be selected and displayed in Moodle - for example, when an editing teacher clicks Add an activity or resource > File, or when a forum participant adds an attachment to a post. File Picker is used to upload files to your course.
File Picker can also be used to link to files in an external repository, if it has been enabled by your administrator, such as Dropbox, Youtube, Wikimedia, Google drive.
Usually the file is copied into Moodle from wherever you have chosen it (e.g. a repository or your computer), though for certain repositories, such as the YouTube videos repository, a link is created, and in some situations an alias/shortcut may be created.