Disk has now run out of space, even though allocated storage was set?

It will not clean itself, you may setup a logrotate

or use a custom script:

This is mean that the usage in the databases is incorrect. To fix it you need to have an enabled scan on startup (it’s enabled by default) and restart the node, to track the progress of the used-space-filewalker:

Make sure that you do not have errors related to the filewalker (search for error and filewalker) and/or the databases (search for error and database).