Why can't I see the Files tab?
|Knowledge Article Number||000176080|
|Description||The Files tab is only enabled when Chatter is enabled.
|Resolution||To enable Chatter in your Organization:
1. Click | Chatter | Settings.
2. Click Edit | Enable Chatter | Save.Setup
Also, If "Profile-Based Chatter Roll-out " is activated in your Organization and the Profile of the user has the "Enable Chatter" permission disabled, then that user will not be able to see the File Tab.
If it does not help, please ensure that the Tab Settings for Chatter is set to Default on.
See Also: Control Chatter Access through User Profiles