OneDrive Files On-Demand helps you access all your files in OneDrive without having to download all of them and use storage space on your device.
When you turn on Files On-Demand, you’ll see all your files in Mac Finder and get new information about each file. New files created online or on another device appear as online-only files, which don’t take up space on your device. When you’re connected to the Internet, you’ll be able to use online-only files like every other file on your device.
Let’s try it out.