I feel this was discussed already, but I can’t find neither forum topic nor the doc/faq.
Here is the use case: I have a library that was initially scanned without PS coping assets to Library folder. Later on I turned this feature “on”, but this applies only to new assets. How do I “rescan” all assets and make PS copy all to Library dir? I tried Rebuild (slow), but it did not do what I am trying to achieve.