Restrict access/close access

From Wikipedia

The setting 'write access' shows another feature. Every authorized user can disallow downloading of a file. This is especially useful, if a group is working together on a file, and you want to make sure only a single person is doing changes to the file at any given point in time.

A permitted file will be displayed with the one set the permission. The permission is only to release from the author of the file (the one who originally uploaded the file) an.