There is a setting under EDIT; Remove Unused but that does not delete the clips from the hdd, just from the project.
In the Project Window go into the metadata and set Video Usage
Sort on Video Usage,
Select all none used,
Select Media Files Are Deleted,
Gone from the project and your hdd.
open all bins. (alt+click ony any closed bin in WIndows)
edit - remove unused
edit - Undo (-> all unused clips are back and marked up)
if you dare to:
make offline - media files are deleted
delete the offline clips from the bins if you want to
otherwise do this first:
make offline - media files remain on disc
look in your sequences if anything is offline that shouldn't be
then: file - revert (make offline can't be undone, it seems, so this is the way to switch back to online status)
if you dare to delete the files now start the procedure again and choose 'media files are deleted'.
that is what i would do and have already done once or twice, but i would never tell anybody to do so, and if some body did and anything went wrong i would not want to know, please ;-)
and as Ann showed:
a bin view with video usage and audio usage active is helpful in controlling the program's choices
Perfect, thanks all!
I sorted by "Video Usage" and selected all unused clips, made them offline & deleted the files.
Works great - cheers!