Why, after migrating Windows to a new SSD, does the size show the old disk?

Question

Windows

I made a system image (two hidden disks, one system disk) using windows 10.
Next, a bootable flash drive and uploading the image to a new SSD.
Everything turned on, but the disk shows the old size, 512 mb instead of 2tb.
Disk management shows that 1400 GB is "unallocated".
What to do and why did this happen?

Answer 1

Well, because you cloned the drive.
You have an exact clone of the previous disk, as it should be.

What to do and why did this happen?

Yes, whatever.
You can leave it as it is, you can create a new partition, you can extend the current partition.

Answer 2

Put some Acrionis Disk Director and stretch the existing partition to the entire disk space.

Answer 3

Computer management -> storage devices -> disk management -> select a disk partition -> expand volume.

Answer 4

Acronix transfers the image from size to size.
But Ghost immediately transfers and expands to the size of the new disk.