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Do you want to move where one drive for business is installed? You'll have to reinstall to do that.
To move your sync folders, here's an article that will help you out.
Stop Syncing ..which you've mentioned is already done because of lack of space.
Once you've stopped all folders from syncing, follow these steps:
Navigate to your OneDrive for Business library you want to sync, and click Sync.
Click Change in the OneDrive for Business dialog box, and then select a new location as the root path on your local drive. OneDrive for Business does not support syncing to a network drive.
Sync library dialog with Change location link
WARNING: If you’re already syncing files to your computer using OneDrive for Windows, you should not use the same location that you use with OneDrive for Windows to sync files with OneDrive for Business.
If you don’t see the “Change” link in the dialog box, it means you’re currently syncing at least one library. Go back and stop syncing all drives.