I found that sometimes my files which I put on my iCloud are going to disappear from my local hard drive and thus force me to download them again. These files have the "download from the cloud" icon on Finder, and I'm not sure when and why these icons are added to which files.
I don't like to download them again, but this happens quite often. The files are put under
~/Library/Mobile Documents/com~apple~CloudDocs/my_directory. How can I avoid them and keep the files available at local?