I suspect you've run across a reserved filename issue.
https://www.google.com/search?q=windows+reserved+filename
"From Microsoft's documentation: Do not use the following reserved
names for
the name of a file: CON, PRN, AUX, NUL, COM1, COM2, COM3, COM4, COM5, COM6,
COM7, COM8, COM9, LPT1, LPT2, LPT3, LPT4, LPT5, LPT6, LPT7, LPT8, and LPT9.
Also avoid these names followed immediately by an extension; for example,
NUL. "
It's a reserved filename; you won't be able to use it on windows ever,
at
least not without bugs and incompatibilities.
E.G. aux.something or any other long file name that gets stored as a segment
starting with AUX.
> -----Original Message-----
> From: samba [mailto:samba-bounces at lists.samba.org] On Behalf Of Eric
> Levy via samba
> Sent: Sunday, January 09, 2022 9:18 AM
> To: samba at lists.samba.org
> Subject: [Samba] unexpected name obfuscation
>
> Using Samba client I have mounted a share provided by a Samba server.
> Both endpoints are Linux Mint.
>
> The shared folder sits on a Btrfs file system, and the top-level sub-
> directories have simple names. All are exposed directly but one, whose
> name is obfuscated. The actual name is not at all unusual, however,
> being only the three ASCII characters "aux".
>
> The composition of the name may be easily verified, from a shell prompt
> on the server, as follows:
>
> $ ls -1d aux | wc -c
> 4
> $ ls -1d aux | hexdump -c
> 0000000 a u x \n
> 0000004
>
> How may I expose the name without obfuscation?
>
>
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