I see this question asked often in tech and gaming pages and I think this is the simplest way to do it. Let me introduce you to one of my favorite utility programs, the MiniTool Partition Wizard.
The Partition Wizard is another one of those disk partitioning tools but it comes packed with features like Migration to SSD. You can also make a bootable USB partition wizard if should you need it, but for this guide, you won’t need it to be bootable.
Take note though: Migration process with Partition Wizard will destroy all data in your target disk, so it’s wise to make a backup in advance. It won’t have any effect on the data in the original disk though
How to Migrate OS to SSD/HD (guide from the MiniTool website)
Step 1: launch MiniTool Partition Wizard to get its main interface.
Step 2: click on “Migrate OS to SSD/HD” in toolbar.
Step 3: choose a right method to migrate your system disk and click “Next>“.
To Replace the System Disk
Firstly, please select the target disk to migrate system disk to and click “Next>“.
Then, choose a copy option. Alternatively, you can manually edit partition size by inputting exact partition size in MB, GP, or TB.
Next, read a popup note and click “Finish” to continue.
At last, click “Apply” button to execute pending operations and tap “Yes” in pop-up prompt window to allow changes.
To Migrate Windows Only
Here, you also need to select the target disk to transfer Windows 10 to and click “Next>”
Then, select a copy option and click “Next>”
Next, read the boot note and click “Finish“.
At last, click “Apply” button in toolbar to execute pending operations and tap “Yes” in pop-up prompt window to allow changes.