Dvc is great tool!

I haven't heard of dvc, so I had to google it, which took me to: https://dvc.org/

But I'm still confused as to what is dvc is after a cursory glance at their homepage.

It was on the front page contemporaneously with this comment that recommended it, so you know it was an unbiased recommendation. :)

There is also git-annex, which supports S3 as well as a bunch of other storage backends (and it is very easy to implement your own, it just has to loosely resemble a key-value store). Git-annex can use any of its special remotes as git remotes, like what the presented tool does for just S3.

Also worth checking out https://github.com/jasonwhite/rudolfs

Been using it to store datasets via lfs. Written in rust and has been very reliable.