syncthing falls down when you hit millions of files.

Platform agnostic? Rsync from the perspective of duplicating the client-presented data.

Or rclone, another great tool. I tend to use this for storage providers instead of between self hosted systems (or data center fully self-managed systems.)

If the NAS uses zfs then zfs send/recv is the best, because you can send only the changed blocks. Want to redo the names on every single movie? No problem! I do recommend sanoid or syncoid, I don’t remember which. ZFS snapshots are not intuitive, make sure to do LOTS of testing with data you don’t care about, and which is small.

In terms of truly duplicating the entire NAS, we can’t help without knowing which NAS you’re using. Or since this is selfhosted, which software you used to build a NAS.

But then again they have no health care costs whatsoever.

May I suggest checking these out? https://shokz.com/products/openrunpro

Not affiliated, just like mine for when I need to keep my ears completely open. Audio quality is surprisingly good, but also never going to compete with something whose sole purpose is to sound good i.e. non-sporty headphones.

Bike riding is perfect for these bone conducting headphones, you can listen to tunes while hearing absolutely everything.

I’m on mobile but didn’t see anything having to do with gender differences in training, only country based, which was not my point at all.

Right in the first part, but for the second: police come in more than one gender and the training is the same.

(Afaik on the training part - I welcome being proven wrong!)