Transferring Unity Project Between Computers.

I did a 2D Project on my old PC few years ago on unity 5.0.1f Nw i want to transfer it to a new PC to a different Version of unity( or even the same version) .
But when I copy over the project folder (From My Documents) and Open it in the new PC ,all the sprites have disappeared in the editor. How do i Relink them ??

Can you try to only copy the Assets and the Project Settings folders on the new PC instead of copying the whole project folder? I have always done this when switching versions to test if it’s working before updating my main project.

Tried it… the same thing…sprites don’t show…