So i just built a new computer and i got an 256GB SSD and installed fresh windows on it. From my old PC i have 1TB HDD which also had Windows on it plus alot of data that id like to keep. My question is can i just plug in the old HDD in my new PC and copy over some files to my SSD and only then format the HDD or do i have to format the HDD before i can use it in the new PC?