Cloned Drive is Smaller than Original but shows the original's capacity

[IncredibleJ1]

Hi guys!

So long story short, I've been migrating an old laptop to a new one and decided just to use a 3rd party imaging tool (MiniTool Shadowmaker) to force them on. For the most part, things are working fine and I've just been swapping around drivers but side effect of some earlier attempts was that the old laptop had a 512GB HDD that I shrunk down to a 128GB partition and figured I could re-expand on the new computer with a 256GB SSD. Well, turns out that disk management, even though it knows that the drive seemingly is 256GB in it's properties, also thinks it has over 300GB of free space to expand to. Any ideas since I don't want to expand it incorrectly and then have new files being written into neverland? Normally I hate using clone utilities but my grandparents don't wanted all their apps moved and I figured it would be the quickest.