button in the toolbar. 4. Click the Info button at the top of the pane that appears. 5. In the Info inspector, click the Modify RED RAW Settings button. 6. ...

https://www.apple.com/jp/final-cut-pro/docs/RED_Workflows_with_Final_Cut_Pro_X.pdf

Render files, optimized files, and proxy files are all considered generated media because the system creates them in the background after the original media...

https://www.apple.com/jp/final-cut-pro/docs/Media_Management.pdf