Yea nothing is perfect but I have never had the issue you are having but I did have the issue where my iMac, MacBook, iPhone, and PC iCloud app were all storing everything uploaded into iCloud on my local HD on all my machines too except the phone. This happened after an update also. I had to set my setting to not auto downloads my iCloud pics, docs, ect... to my local drive. “Just stay in the cloud till I say so okay !” Maybe this helps you also.