it can be wrong if you have Windows installed on 2 different memories in the same computer
Avoid doing that—it can't help, and may well cause problems since you're not familiar with making it work.
Trying to interpret your setup, is this correct?
♣ You have a new PC with Windows already installed and working;
♦ You have a SSD from an old machine which also has Windows on it;
♥ You don't plan to use the old PC anymore.
If that's your situation:
♣ Delete Windows from the old SSD—format is best, but delete will work;
♦ Note that format will erase everything on the old SSD, so if you have personal data—images, documents etc—you need to copy that elsewhere first;
♥ Windows installs a lot more than just the Windows folder, so deleting rather than formatting will still leave a lot of useless stuff behind—but it shouldn't cause any problem other than wasted space;
♠ Install the old SSD in new PC and use it to store personal data and games.