I hadn't thought of that (about parking data.).
Also, since I am gun shy about getting rid of iCloud Drive b/c I might lose stuff, I will back my computer up with the external drive first and then try getting rid of iCloud Drive.
This is a general heads-up: if you ever need to park data on your external you should park it on your Mavericks partition, because you'll never update it.
If you park it on either of your Sierra partitions Super Duper! will ERASE it the next time you update your clone.
