Q: I have OneDrive unlinked, but the Document folder still has one drive in my profile.
A: The correct procedure would be to turn off the OneDrive PC Folder Backup for the Documents folder. Unlinking from OneDrive does not remove OneDrive from the Documents folder path. Just see the video here. You will just click “Stop backup” instead of starting the backup.
A2:
1. No, uninstalling the OneDrive sync client will not deleted your file but make sure all the changes you made in the OneDrive sync client is synced to the OneDrive Online.
2. Yes, you can still access your content in the OneDrive even after uninstallation of OneDrive sync client.
3. When you setup the OneDrive account on the sync client, the File On-Demand feature will be enabled by default and because of this feature, initially all the content in your OneDrive folder will be cloud-only where it won’t take any space on your computer, but when you try to open any content in your OneDrive file, the opened file will be downloaded and take space on your computer, this will make you to open the file again even without internet connection. Reference: Save disk space with OneDrive Files On-Demand for Windows – Microsoft Support