Nextcloud sync to no permission to write folder

Hello, I am trying to sync a folder that has no permission to write. I am wondering if I can set up nextcloud so nextcloud can sync that folder. I do not want nextcloud to write anything at all. I just want nextcloud to download and delete changed files and folders. I do not want nextcloud to write and add other saved files into the folder. I am wondering if it is possible to sync folder without permission to write.

Any help appreciated thanks.!