I've been using Mac OS my whole life, starting off with System 6 as a young kid and being a savvy computer user my whole life, so I am no dummy when it comes to computers or how they function. I am completely shocked by what happened tonight and I had to share to hopefully prevent this from happening to other people. A few months ago my Time Capsule stopped working and tonight I realized that I am MONTHS into a no-backup situation. Yikes! I decided to use iCloud to back up my files as a stop-gap solution.. I purchased more storage as directed and turned on the option to back up the Desktop. 24hrs later it had only uploaded about 3GB / 80GB, (we have 50mbps upload...What the heck?). Anyway, I wasn't willing to wait a month for it to finish so I turned it off. Boom, Finder crashes and relaunches with everything missing from my Desktop. No Desktop or Documents folders in the User directory. What. The. Hell?! I was legit freaking out thinking months of work had just gone poof. Turns out that they got moved to the iCloud Archive folder in my user folder, which I located a few panicked minutes later. What a HORRIBLE experience and what a poorly-thought-out setup! Files should never be deleted from the Mac or moved from their original location! Why do this?! I can kind of understand it from a seamless UX perspective but it's only seamless from Mac > iOS and leaves a sketchy situation on the Mac IMO. Meanwhile there are still tens of thousands of files being uploaded and downloaded in the background even with the Desktop / Docs backup option off and I'm afraid to do anything but let them finish. I have no idea where these are coming from or going to. Thanks if you made it to the end of this. Not surprised if most TLDR this post but it felt good to vent some stress and hopefully warn others that this feature can be dodgy and to please not attempt it without a physical backup!