macOS not showing the actual free space of external WD ssd

Of course, having seen that, I had seen the problem.

• Now please, is there a suggestion how to get the system to free up the space?
• I can - but do not like - to copy the folder to a HDD, reformat the SSD and copy back.

Here my proof.

As you see, Disk Utility is also wrong wrong.

Just for completeness, I tried to do what P.Phillips suggested. [Rebuild the Spotlight index on your Mac]

I selected the external drive to the privacy tab of spotlight, restarted. After restart, the external disk still is identified as having 1.3TB in use.

Thanks. However, the spotlight/Privacy tab is empty (nothing excluded).

So should I

1. select the specific drive to 'privacy = excluded', then restart,
2. and then take it out again, restart?

The location is indexed, I can see the files, and spotlight brings the content up.

The problem is, the system (=Monterey 12.0.1 so to say) thinks the disk is almost full while I off-loaded content.

I also did a disk-utility, First Aid it must be called, no effect.

• • [Except I saw that is sees I use CCC/Bombich to backup those files]

Just to show the wastebin is empty