Hi on your new purchase! With a new computer, I would definitely want to make sure it runs smoothly so with reference to your mods and cc I would treat them like a new update and not transfer them over in '.one', especially if you've bought this computer because of the Cats and Dogs Pack, a lot of mods and cc cannot handle it. Also, if you've been playing with no problem on your old computer, then perhaps it's ok to go ahead and move the mods folder over.