To check the access history of a file, choose Properties from the right-click menu or the menu bar. When viewing a file, click and then click Properties. Click Access History to see all activity for that file.
The list there shows you when the file was accessed, how the file was accessed (for example, by using a link) and by whom, and what was done, such as download or view. If a public link was used by someone who’s not a member of the folder, the link name is shown.