To setup new SharePoint Folders to be synced the following should be done:

  1. Go to the location in SharePoint in which you want the new folder to be synced to.
  2. Create the new Folder. If you want to sync an existing SharePoint folder skip to step 3. If you want to use an existing folder on you're PC you will have to still create the folder and proceed up to step 5. After which you can then move the content from the folder on the PC to the synced folder.
  3. In the folder click on the Sync option:
  4. You will then be taken to the OneDrive application just proceed through the dialogues.
  5. The synced folder will appear similar to this:
  6. Any files you create, move or delete in the folder will then be synced between the PC and the folder on SharePoint.