odrive, by default, is very conservative with syncing and will only sync what you explicitly tell it to sync. If you only want to sync the contents of one folder, right-click on that folder, select "sync", slide the slider all the way to the right for "everything", and make sure none of the checkboxes are checked.
You can find out more here: https://docs.odrive.com/docs/sync-your-odrive
There is a search option on the forum. It is at the top right. Just click on the magnifying glass icon.