I want to sync my bookmarks from an old laptop to a new one.

I just got a new computer. I didn't know you could sync bookmarks across computers, so I started recreating my bookmarks. Then I found out you could sync them, so I set up a sync account and tried that. It transferred the bookmarks I had started on the new computer to the old one, but not the bookmarks I had on the old one to the new one. These are the bookmarks I want, so how do I put them on the new computer as well?