I'm having a hard time with iCloud Drive on Mac. The files I drop in iCloud Drive folder simply sync while I wanted to upload the file to cloud so that I can delete the local copies in my Mac to free up space. I had to open iCloud in browser to upload files. As I'm on slow internet connection, uploads stops midway incase of large files. I thought optimised storage feature in macOS Sierra might solve the problem, but its automatic and I don't get to choose the files I actually want to upload. So I need suggestion about any third party apps that could upload files to cloud or any other cloud service that works seamlessly among apple products.