https://wccftech.com/disk-cleanup-windows-10-october-2018-update-empty-downloads-folder/

The rollout of Windows 10 October 2018 Update may have been paused, but it doesn’t mean that the latest Windows 10 version brought problems to everyone. Many of our readers have reported a successful installation process and post-installation experience. If you belong to this group, there is one warning you need to pay attention to.

The Windows 10 version 1809 brings a number of features, improvements, and enhancements. While we have already talked about the highlights of those, there are several small adjustments and changes that will take weeks and probably months to spot. One of these is the addition of Downloads folders in the Disk Cleanup process.