Hello!
To clone just the OS to your new M.2 SSD, you can follow these steps:
1. Install and open Macrium Reflect on your computer.
2. Connect your M.2 SSD to your computer using an appropriate adapter or slot.
3. In Macrium Reflect, click on "Clone this Disk" option from the main menu.
4. Select your current HDD as the source disk, and choose your M.2 SSD as the destination disk.
5. Make sure the option to clone only the OS partition is selected.
6. Review the settings and ensure everything is correct before proceeding.
7. Click "Clone" to start the cloning process.
8. Wait for the cloning process to complete. This may take some time depending on the size of your OS partition.
9. Once the cloning is finished, shut down your computer.
10. Disconnect the HDD from your computer and connect the M.2 SSD in the same port where the HDD was connected.
11. Start your computer and enter the BIOS settings.
12. Set the M.2 SSD as the primary boot device in the BIOS.
13. Save the changes and exit the BIOS.
14. Your computer should now boot from the M.2 SSD, with all your OS files and settings intact.
Remember to keep a backup of your important files before performing any disk cloning operation, just to be safe.
I hope this helps! Let me know if you have any further questions.