A hidden new feature in macOS Sequoia and iOS 18 is the ability to mark files to be kept downloaded even if you have iCloud Drive "Optimize" turned on.
Note: This is Club MacMost exclusive content. To view this video click the thumbnail below to go to the post as Patreon.com. Once there you will be able to view the video as long as you are logged into your Patreon account and a current supporter of MacMost at the "Club MacMost" or higher level.