Remove OneDrive from File Explorer

To Unlink OneDrive:

You won't lose files or data by unlinking OneDrive from your computer. You can always access your files by signing in to OneDrive.com.

Windows

1. Open OneDrive settings (select the OneDrive cloud icon in your notification area, and then select the OneDrive Help and Settings icon  then Settings.)

2. Go to the Account tab.

3. Select Unlink this PC.

Source: https://support.microsoft.com/en-us/office/turn-off-disable-or-uninstall-onedrive-f32a17ce-3336-40fe-9c38-6efb09f944b0