A while back I set my computer up to sync folders on a shared network drive. I didn't choose my folders carefully and ended up with a huge amount of files to sync, which took forever. I would like to stop sync on those folders, then later select some smaller subfolders to sync. I believe this means I first must delete the existing sync partnerships, but there is no "Delete" option when I list them in Sync Center.
How can I delete existing sync partnerships?