Various tools exist for this method, but one good (and free) option is to use Macrium Reflect Free. Unfortunately, as this process doesn’t work if you’re moving from a larger to smaller drive, you’ll need to use third-party software to copy Windows instead. Using a new system image to clone your hard drive is still the best way to migrate Windows 10 to a new hard drive. Transfer Windows 10 to a Different Sized Hard Drive Using Third-Party Software After a few moments, your system partition will be expanded to include the additional space on your drive, ensuring that all available drive space is usable.
