Cleanup cronjob is now running every hour.
It is set up to delete nothing which is newer than 30 days, and also to always keep at least the first three and the last three versions.
At the moment only cleaning up in "data/attic", but there are other places like "data/media_attic" (not much there at the moment), the cache (some gigabytes) and maybe more. Just not quite sure yet about how everything else works, not wanting to delete too much. So there is still room for improvement.
Disk space usage for accesstoinsight.eu is now shown as 8.02 Gigabyte. Not sure how much it was before.
* Now leaving for tonight. May all the deleted files find a fortunate rebirth, if not release into nibbana.