How do I get the save back?

Help me, I was doing my first project, it was 80% ready, I decided to clean the project folders, it downloaded prefabs, and because of this, important elements for me were deleted. By clicking on the cancel buttons, I most likely clicked on the keyboard shortcut that is responsible for saving. And noticing that important prefabs were deleted, I closed unity, but there was no save sign, opening it again, the version opened without important prefabs. I downloaded these prefabs again, everything began to display as it was, but all the settings, some scripts, sizes and mechanics flew off. How do I return a previous save???