How to Sync OneDrive with a File or Folder

With OneDrive, you can sync files between your computer and the cloud, so you can get to your files from anywhere - your computer, your mobile device, and even through the OneDrive website at OneDrive.com. If you add, change, or delete a file or folder in your OneDrive folder, the file or folder is added, changed, or deleted on the OneDrive website and vice versa. You can work with your synced files directly in File Explorer and access your files even when you’re offline. Whenever you’re online, any changes that you or others make will sync automatically.

If you have a file, folder or many folders that you would like to sync with OneDrive, here is a quick tutorial on how to perform the setup:
https://support.microsoft.com/en-gb/office/sync-files-with-onedrive-in-windows-615391c4-2bd3-4aae-a42a-858262e42a49