What creates thousands of ".dat.nosync" hidden files on Mac OS X?

I'm managing many hard drives often shared over the network (SMB). Every now-and-then I find folders that somehow have thousands or tens of thousands of hidden files like this:

.dat.nosync40b7.5jNfXw

They are all called .dat.nosync but the "40b7.5jNfXw" seems to be incremental or random. These files make it impossible to list the contents of a directory sometimes. And when I just rm -v '.dat.nosync*' I get too many arguments as there are way too many files.

What is making these weird files and why so many of them?

3 Reset to default

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