At a guess, your NAS doesn't like the renaming of temp files. Yes, this is required with Versioning (to ensure the new file has arrived safely (under the temp name) before we Version the existing copy, then rename the temp file to replace it. Something similar (renaming of temp files to the real Zip name) is often used during Compression, yes.
Windows can do it, so why not your NAS? You'd have to ask them.
Windows can do it, so why not your NAS? You'd have to ask them.