FreeFileSync Forum

It has nothing to do with upper or lower case of either the filename or the extension.

In DOS, if you try to print to a file named prn.txt, prn.csv, or prn.xxx, your data gets sent to PRN (which is the printer) instead of to a file. If you try to print to a file named con.txt, con.csv, or con.xxx ...

THIS ISSUE IS NOW RESOLVED.

I found that SAMBA defaults to "mangled names = yes". A setting (mangled names = no) can be added to remove this behavior, which was necessary for DOS, but is no longer needed for current versions of Windows.

For OMV (Open Media Vault), I added the setting (mangled ...

I've isolated the problem to SMB. Copying the files manually to a second Windows folder does NOT change the filenames, but copying them to the SMB folder (with DOS 'copy', Windows 'drag and drop', and Windows 'copy' and 'paste') does.

I will continue to investigate SMB.

Another investigation, I just used WinSCP to copy the files from the first folder to the second folder. It also changed the filenames.

I again used windows drag and drop, and the filenames looked good, but when I refreshed the second folder, the filenames were changed.

It now appears that this ...

Thank you for your quick response :)

You are correct that the second folder is accessed via SMB, but the main issue here is that simply running FFS Compare should not change any filenames.

Investigating further, I created empty text files with the names "CON", "AUX", and "NUL" and manually copied ...

When mirroring (both two-way and one-way) on a folder containing only two files ("PRN.csv" and "PRN.txt"), the "PRN" filename is changed to "PITWVK_3" on both files in the second folder.

To investigate this issue, I then manually copied both "PRN" the files to the second folder and deleted the two ...