Are there any good rsync GUIs for Windows?
I used QtdSync for a while (in differential mode which uses hardlinks on NTFS): https://qtdtools.com/page.php?tool=0&sub=0&lang=en
At some point I forgot about the scheme and started synchronizing things manually.
Rsync is pretty closely tied to unixy concepts of permissions, paths, access times, etc. You can find some rsync based tools for Windows, but IMO, it's a square peg / round hole unless you're using it inside of WSL.
robocopy is the Windows equivalent of rsync
Kinda, sorta. Robocopy is a very good tool, but it cannot do incremental file updates. Already mentioned bvckup2 can do deltas, but it's not an rsync client.
I use Bvckup2 for doing Windows backups; it's commercial but works really well for me.