: Supplementary datasets for academic journals, including climate data or temperature scale revisions .

To see what is specifically inside your "MB.rar" file, you must use an extraction tool: Supplementary data for - IOP Science

: Large PDF documents, such as a 4,000+ page service manual for a vehicle, which may be compressed from 75 MB down to a 35 MB RAR file.

: In "scene" releases (common in file-sharing), large files like movies (e.g., 710 MB) are often split into multiple smaller RAR volumes (historically 1.44 MB, 5 MB, or 50 MB each) to facilitate easier downloading over unstable connections. How to View the Contents

Because "MB" is a general unit of digital storage, several distinct types of content are commonly associated with archives named this way: Common Content Types

: High-resolution 3D models or graphics, such as an Aston Martin Victor model.