@BSPC, Did you perform disk clone from a small disk to a big one? Did you select "Fit partition to entire disk"? Please take a screenshot of Partition Assistant so that we check the layout of your disks.
@BSPC, when you select "Fit partition to entire disk", it will resize the cloned partitions so that is used all space of the target disk. If you want to clone with 1:1, please select "Clone without resizing partition".
Comments
→ Source drive : Samsung SSD SATA 250 gb
→ Target drive : Samsung SSD SATA 500 gb
→ Did you select "Fit partition to entire disk"? → YES