Hi there, @LonerLuanda, thanks for posting your question today.
Indeed, you can use two different features on your computer, to save hard drive space.
You can use selective sync, to choose which folders you want to have available on the computer and which to have online on dropbox.com.
And you can also make files online-only, so you can still see them on the computer, but sync and access them only when you need to.
You can see more info about this here and here.
Let me know if you have any questions!