Files with m$s file extension might be found as firmware updates for MindStor devices.
M$S file extension - MindStor firmware update
What is m$s file? How to open m$s files?
File type specification:
The m$s file extension is related to firmware update files for older MindStor devices. Used to fix programs and enhance the core system. Probably only used in the MindStor.
This m$s 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.