I have my iCloud Drive turned on for my laptop as well as for my iPhone and my iPad. When I upload files from my laptop to the iCloud Drive folder, it makes a duplicate of the file already stored on my computer's hard drive which takes up unnecessary memory space. Even if I try to upload a file to my iCloud Drive from iCloud.com it automatically downloads that file to my laptop's iCloud Drive folder and again takes up space on my laptop's memory. However on my iPad and iPhone, I can see that those files are present in the drive, but they show that the cloud symbol in that they would need to be downloaded in order to access.
What I want to be able to do: have an iCloud folder available to drag and drop but not have it duplicate storage on my laptop that is just in a different location so that I can use it as a backup, and use iCloud Drive as a cloud storage that can be accessed through iCloud.com but not have whatever file I add to it automatically download to my laptop as well. For example, I have a 90gb folder that I uploaded to iCloud.com from work, and when I went to use my personal laptop it automatically began to download the 90gb folder which is not what I want whatsoever.