I’ve just had a very easy time upgrading my system drive to a much larger SSD using Paragon Migrate (click here). @ParagonSoftware
The software cost £14 but the migration process was so easy – literally plugged new SSD in, turned computer on, downloaded/installed software and ran the program and within a few minutes it was copying my whole system drive, including the Windows installation. I’ve unplugged my old drive now and it works EXACTLY as it did on the smaller drive, just with 352GB free, rather than 3…
I’d highly rate this software if you want to change your system drive (as you cannot simply copy-paste system files….)!