I have done this before when I sold my old 512GB Samsung 950 Pro ssd and migrated my OS + all programs on it to a 1TB Sata Samsung drive, because the 512GB became to cramped for all my games. Now I am intending to do the reverse, I want to buy a relative faster Samsung 970 Evo Plus 500GB m.2 ssd and keep the majority of the games on the single 1TB Samsung Sata SSD. The only thing that will stay on the fast m.2 ssd are Windows, a few programs and a few games I regularly use. A 500GB drive will show up with a capacity of 465GB. Currently I have on my C-drive (which is 1TB) 569GB in use. Please note that all my Origin and Steam games are on that drive and I can easily do a migration from one folder to another. Also I have still GTA5 on that drive, a game a barely play anymore. That map alone is good for 85.9GB. My question is, when I create less than 465GB of data on my current C-drive will Samsung Data Migration have no problem with copying the whole OS + remaining programs and games to the new m.2. drive?