iCloud not keeping the files on Desktop and etc,.

Hi,

I'm using iCloud to sync my Desktop and Documents (only).

But, lately every time I need to open a file Mac download it from the iCloud.

Hence it is very slowly, and sometimes without internet I get stuck without the needed files.

How can I disable iCloud from keep the files only on the cloud? so the files will be stored also on my MacBook.

Thank u