DISCLAIMER: DOING THIS ALSO WORKS VICE VERSA. IF YOU DELETE A FILE THEN IT WILL ALSO DELETE ON ONE-DRIVE SO BE CAREFUL I HAVEN'T UPDATED THE PROPER METHOD TO SYNC FOLDERS

Just form a link between a folder in your OneDrive and the folder you want to sync on your desktop.

One Drive Folder (Make sure this folder does not already exist)

D:\OneDrive - iOuch Examples\Obsidian Backup

Folder on Windows (To Sync)

D:\CodingFiles\PersonalCoding\Hosted\note-docs\quartz\content

Run CMD as an Administrator and paste this command

mklink /J "D:\OneDrive - iOuch Examples\Obsidian Backup" "D:\CodingFiles\PersonalCoding\Hosted\note-docs\quartz\content"