Guide to check if a folder or file is shared and how to remove
1.
  1. Visit a file or folder and click on the 3 vertical dots .
  2. Click on Manage access.
  3. Those within the organisation will be shown under Direct Access, for those external you need to look under Links Giving Access and you will see this icon  if any access has been granted.
  4. To remove, Click on the arrow pointing downwards to expand.
  5. In this instance, only one link has been issued
  6. To remove access, click on the small x next to the access you want to remove.
  7. You will be shown something like this.
  8. Click Remove.
  9. The external user will not be able to access the data any more.
Note, if they have local copies downloaded then they can still access those.