80Gb HDD->250Gb HDD Migration

Does anyone know how to migrate the OS and files from one drive to another? They both have one partition if that helps and the 250Gb has been formatted if that helps.

I'd use Clonezilla and image the 80GB partition on to the 250GB drive. Then expand the 80GB partition to fill the 250GB drive.

 

Of course! I heard of other paid options, but paying to move files makes no sense at all.

Imaging the drives makes a lot more sense, thank you! :)