Delete files from server

Good day, is it possible to disable the client for Windows, deleting files. If I delete a file in the sync folder in Windows, he would not have retired to the SeaFile server.
here is an example: OS Windows7
Sefile client for Windows
I have a folder on the desktop “Work” is synchronized with the server. If I delete the example.docx file in this folder this file is also deleted on the server. How do I disable this feature? I need to delete the example.docx file from the Work folder, the example.docx file was not deleted on the server.

Give only read access to the folder?

Good afternoon,
I need the opposite, when you delete a file example.doc from the folder in Windows on the server that it would not be deleted