Once content is added to Content System, permissions must be granted to make the content accessible to users and groups. Managing permissions on files and folders may be complicated since permissions behave both alone on single items and in combination with other permissions on folders. Users are user lists may be given different types of permissions to individual files and folders, ranging from read only access, to editing, managing and removing content.
Permissions enable users to read and perform actions on items and folders added to the Content System. Users must be granted permissions to access content directly from the Content System and also through links in Courses and Portfolios.
The following permissions are available within Content System:
When a user searches for files or folders, or attempts to manipulate files or folders (For example, using copy, move or remove), the user will only be able to view and alter content based on the existing permissions. For example. if a user searches for an item to which he or she does not have Read permission, the item will not appear in the Search Results.
Permissions are added and removed on the Manage Permissions page for an item or folder. Permissions can be added according to the following methods:
Select Permissions from the contextual menu for the appropriate item. The Manage Permissions page appears.

Click Select Specific Users. The Add User page appears.

Note:If permissions are added for a user or user list but no check boxes for specific permissions (Read, Write, Manage, and Delete) are selected, the user or user list is still added to the Manage Permissions page. This is true for all users and user lists with the exception of Public and All System Accounts. In these cases the user list is not added to the Manage Permissions page if no permissions are selected.
Click Submit.

There are two ways of granting permission to all users:
Permissions granted to a folder may or may not affect items and sub-folders within the folder. An additional option, Overwrite, appears on the Permission pages for folders, allowing the user to choose how the contents of a folder are affected when Permissions are edited.
If the Overwrite option is selected, the current permissions for all items and sub-folders in the folder are removed. The permissions selected in the Permissions field are granted to these items and sub-folders. After editing permissions on a folder, the user may change the permissions on an item within the folder. These permissions will be overwritten if Overwrite is selected for the parent folder again.
If this option is not selected, the permissions selected in the Permissions field are granted to all items and sub folders, but existing permissions are not removed. For example, if an item already has Read permission, and only Write permission is selected on the Add Users page, the item will be granted Read and Write permission.