The File Management page allows you to set the ACL (Access Control List) settings for the selected file or file directory.
To grant file access rights to a user, enter the user name into the Identifier field, select the desired access rights, and click the Update button. To grant an access right to everybody, use the word anyone. To remove certain rights from a particular user, "grant" those rights to the identifier -username. See the File Storage section for more details.