[Quiet Man Cometh]

So I'm streamlining my files and such to get my comp ready to transfer and I recall being told ages ago that doing a lot of moving/deleting/etc. would leave little phantom gaps and such that defragging what supposed to take care of. Is this still a thing? I'm still running on the assumption that a fresh install is better than moving stuff from one drive to another, so I'm trying to minimize what I move over.