To convert your unmanaged files to managed assets:
Navigate to Assets > Assets Tree.
Select an unmanaged folder or file(s) within an unmanaged folder.
Click Manage on Asset's Overview tab.
Your files are now tracked within the CMS.
Note
Users with administrative rights can also
right click the asset and select Manage or
Unmanage from the context menu, provided these choices
have been activated within the Asset Tree Context Menu options.