is frequently used for Skyrim Special Edition mods or Super Smash Bros. custom builds.

Do you have the of this file, or are you trying to identify where it came from?

Ensure they are all in the same folder and have identical names except for the number.

This could be a collection of high-resolution textures, 3D models, or video production assets divided into multi-gigabyte chunks. 4. Enterprise/Database Backups

could stand for Stock Samples , Screen Shots , or Sound Sets .

Because it is a "part 2," you cannot open it or see what is inside without having (at least part .001) in the same folder.