I had trouble with Onedrive. It literally took months to get everything uploaded (~400gigs). I got a new Mac and copied the already uploaded and synced Onedrive folder to it, and after a month of waiting, restarting, etc. it never synced correctly. So I am looking for a new cloud sync service. My questions are to those with iCloud Drive experience, how robust is the sync? How fast is the upload? Does it handle a large number of files well? Thanks for any advice.