So both the report of free space given with I right click he drive icon check through 'About this Mac' is wrong given that I repeatedly run out of disk space despite x GB being listed as free. Time Machine automatic backups are off, if that matters, and the method of adding the HD to the Spotify privacy list and then removing it in order to reindex isn't working. This never happened prior to upgrading to Sierra. My HD reports back as 'verified', so I don't know what to attribute this to. Any solutions would be greatly appreciated. _________ I'd like to ask another question about Firefox since the quality of feedback on their forum isn't good. Is there a way to create a new recovery.js file at will? I'm dangerously low on disk space at the moment and have an active session I can't safely close because the last backup is from too long ago.