Today, I just upgraded my computer from a 256 GB Samsung 840 SSD to a 512 GB Samsung 860 SSD, but the drive still shows a capacity of only 256 GB, and Windows also currently starts up more slowly than it did before. What does everyone else say about this?

EDIT: I conducted some research, and I used disk management to extend the primary partition, so I now have the full capacity of my drive available, and everything si good for me, now.