Is it possible to copy only C drive to SSD? “I’m working to upgrade the primary HDD to a 2TB SSD for my HP desktop. I have a decent amount of software (Windows, Office, Photoshop, Steam / Xbox games, ...

You may view your hard drive in Disk Management and see unallocated space. The space will be on the hard drive, but Windows cannot use it. It is like having a spare room in your house but locked off.