.9M1 File

The 9m1 file extension is reported to have been used for some sort of RAR split archives. Most likely renamed by some web service or program for their use.  9m1 is first part of archive (9m2, 9m3...etc.).

This 9m1 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.

How to open:

Use WinRAR to work with *.9m1 files.

How to convert:

Probably cannot be converted to other formats.