Is dists/sid/main/by-hash/SHA256/ correct?

There are lots and lots of files like this:
https://mirrors.edge.kernel.org/debian/dists/sid/main/by-hash/SHA256/

I'm confused about these files. They are big and change a lot.

Does anyone else ignore them when running rsync?

Thanks,
Jeff
PS: to explain how big and how often they change, they are almost as large
and change as much as all of the 30,000 packages on all of the debian
architectures. In other words, dists/ changes as much as pool/