Free local disc space setting

I’m using Windows client 3.13.0 and have a question about the “free local disc space setting”.
I activated it and the files are “released” and displayed with the cloud symbol. But new files are not released and have a green/white circle with a checkmark in it. I can click the new files and select free local disc space and this works. But I have a huge count of new files spread over the large file tree. Searching al and clicking every one is a mess.
How can I trigger all files from a root directoy will be released?
Yours, Tolotos

Are you freeing up space via the file/folder in explorer or via the sync folder in Settings?[1]

[1] Appendix B: History and Architecture — Nextcloud Client Manual 3.13.2 documentation