It would be to keep your 40GB drive as the "C" drive and transfer only the data to the new one. That will avoid having to re-install the O/S and also keep all of your settings and programs intact.
Samsung Galaxy S8 review
1995-2015: How technology has changed the world in 20 years
This poetic animation about monsters is illustrated in a Van Gogh painterly style
How to get WWDC 2017 tickets
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.