i recently installed High Sierra on my machine (3TB) and have found that it takes 6 to 7 minutes to boot up now. I have also noticed that my system has taken 855 GB on the hard drive. I have been patiently waiting for the upgrade to accommodate the fusion drive and thought that information contained on the update web site allowed me to put High Sierra my machine. At this point I am wondering were I should go with this, should I try to re-install Sierra, leave the new one on the machine and wait for the upgrade that will settle the fusion issue? Any thoughts?