Syncing and Overwriting existing library


I have a folder on my laptop that I want to sync (overwrite) with an existing library on seafile server.
As the differences are minor, I want the laptop folder to overwrite the seafile library but without complete rewriting. I want on the seafile server library only new or modified files from the laptop to be transfered.

I do not want any files to be updated on the laptop folder.

Is there a way to do that?

Thanks in advance

Please help!