Mb_f_01_20.7z

: Re-examine the website or directory where you found it; the "good text" is usually the title of the forum thread or the "Release Notes" section of the download page.

: Could stand for "Megabytes" (less likely) or a specific collection name. MB_F_01_20.7z

If this was found in a large library (like a ROM set or a document archive): : Re-examine the website or directory where you

: May denote a sub-category (e.g., "Files," "Firmware," or a specific language/region code). How to verify the contents: MB_F_01_20.7z

If you need to know exactly what is inside to write "good text" for a manual or description, I recommend checking the following:

: Often represents a version number (v1.20) or a release date (January 2020).