A Microsoft file hosting and synchronization service.
Dear SBYH,
Good day! Thanks for posting in Microsoft Community. We are happy to help you.
For your queries,
- The option "Always keep on this device" will help you to download this file/folder to your device. Normally, when you set up your OneDrive, all OneDrive files in the File Explorer (OneDrive sync folder) won't take up space on your computer. When you open one OneDrive file or select the option "Always keep on this device", the OneDrive app will download it. After that, you can open/edit these files offline.
- To stop this downloading process, you can select OneDrive files, right-click them, and select "Free up space". After that, this downloading process will be stopped and these files won't take space on your computer.
We look forward to your response. Thanks for your cooperation.
Sincerely,
George | Microsoft Community Moderator