Remove 'big' old and replaced backup

I have an old backup of my documents share, which is 30 GB since this share used to contain Google-takekouts and other zip-files.

I recently cleared out this share, putting the takeouts together in a separate share with their separate backups, pictures and videos to the photos-share,… I also made a new backup and storage for what remains at the documents-share. It’s only 2,5GB… So quite a significant reduction.

But I’m afraid to delete the old backup storage, in case I ever deleted anything accidentally without knowing it.

Does anyone have any idea on how to check this without checking every revision manually in the CLI?

The backup is made with webUI in Docker, but I also have CLI-version on my econd server.

Any ideas? Cause I’m pretty much out of ideas…

Thanks!