I'm in the process of writing up a blog post on how network shares on macOS are kind of cursed. Highlights:

* Files on SMB shares sometimes show up as "NDH6SA~M" or similar, even though that's not their filename on the actual network drive. This is because there's some character present in the filename that SMB can't work with. No errors or anything, you just have to know about it.

* SMB seems to copy accented characters in filenames as two Unicode code points, not one. Whereas native macOS filenames tend to use single Unicode code point accents.

* SMB seems to munge and un-munge certain special characters in filenames into placeholders, e.g. * <-> . But not always. Maybe this depends on the SMB version used?

* SMB (of a certain version?) stores symlinks as so-called "XSym" binary files, which automatically get converted back to native symlinks when copied from the network share. But if you try to rsync directly from the network drive instead of going through SMB, you'll end up with a bunch of binary XSym file that you can't really do anything with.

I only found out about these issues through integrity checks that showed supposedly missing files. Horrible!