I thought the same thing. However I have 2 towers/desktops and 1 laptop. The download folder on all 3 PCs has no data. The only thing I ran was the defrag. The only folder impacted that I can tell was Download. One tower has Optane memory, the other 2 do not.
Yes it is Windows 10, version 1803.
I am totally at a loss. I will research Storage Sense to see what it is and how it is run (auto or manual).
I appreciate your reply. Currently I am lost and confused.
Time for a beer.
Wayne