on Windows.

In product catalogs, strings like 6MS/7Z are sometimes used to identify replacement parts for specific electronics (for example, switches in certain Dolce Gusto coffee machines).

There is no widely recognized software, file archive, or technology feature known as .

Could you please clarify this file belongs to, or what you are trying to accomplish?

If you meant something else, please consider the following common possibilities:

Because 6MS.7z looks like a compressed archive file (the .7z file extension is used by the free and open-source file archiver 7-Zip), it most likely refers to a specific local file on your computer.