Files with twn file extension might be found as setting files from some older scanner device.
TWN file extension - Scanner settings
What is twn file? How to open twn files?
File type specification:
The twn file extension seems to have been in the past used for some sort of settings file for a scanner device. Seems like very old and probably no longer used.
This twn file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.