A window will open, go to the Account tab.

On a PC, look for the blue OneDrive icon the tasktray (you may need to select the carat to see the icon).

You can delete them without affecting the files still in OneDrive. However, they will no longer sync to OneDrive.

Your local copies of any synced files will remain on your Mac. Confirm that you want to stop syncing that library. Look for the OneDrive icon (the cloud) in the Menu This tutorial will show you how to turn on or off use Office applications to sync Office files that you open with OneDrive for your account in Windows 10. If you run into problems with changes not syncing or merging properly, you might want to change your sync settings in OneDrive. On rare occasions, if an Office app closes unexpectedly, or if changes made from different devices can't be resolved, a sync conflict can occur. Most of the time, Office applications automatically syncs changes to Office files saved in OneDrive. For info about syncing OneNote notebooks, see View the notebook synchronization status.

For info about real-time co-authoring, see Collaborate on Word documents with real-time co-authoring, Collaborate on Excel workbooks at the same time with co-authoring, or Work together on PowerPoint presentations. To collaborate on documents in real time in the Office desktop apps, you need a Windows computer running the latest version of Office and an Office 365 subscription. The OneDrive sync client and Office work together to sync documents in OneDrive and let you work with other people on shared documents at the same time. With Office and OneDrive, you can co-edit and share files right in your Office apps like Word, Excel, PowerPoint, and Visio. OneDrive is a cloud-based storage service where you can view, browse, upload, and share the files you saved online to OneDrive. How to Turn On or Off Sync Office Files with OneDrive in Windows 10

How to turn off sync on onedrive